diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8ec6ae9c..a0b01e8e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -28,9 +28,9 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - "1.22"
           - "1.21"
-        postgres-version: [16, 15, 14]
+          - "1.22"
+        postgres-version: [14, 15, 16]
       fail-fast: false
     timeout-minutes: 5
 
@@ -59,10 +59,7 @@ jobs:
         run: go version
 
       - name: Install dependencies
-        run: |
-          echo "::group::go get"
-          go get -t ./...
-          echo "::endgroup::"
+        run: go get -t ./...
 
       - name: Set up test DBs
         run: go run ./internal/cmd/testdbman create
@@ -265,3 +262,18 @@ jobs:
         run: |
           echo "Make sure that all sqlc changes are checked in"
           make verify/sqlc
+
+  submodule_check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "stable"
+          check-latest: true
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Check all go/toolchain directives match
+        run: CHECK=true make update-mod-go
diff --git a/Makefile b/Makefile
index 091a698f..7088f76e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,71 +1,87 @@
-.PHONY: generate
-generate:
-generate: generate/migrations
-generate: generate/sqlc
+.DEFAULT_GOAL := help
 
 .PHONY: db/reset
-db/reset: ## drop, create, and migrate dev and test databases
+db/reset: ## Drop, create, and migrate dev and test databases
 db/reset: db/reset/dev
 db/reset: db/reset/test
 
 .PHONY: db/reset/dev
-db/reset/dev: ## drop, create, and migrate dev database
+db/reset/dev: ## Drop, create, and migrate dev database
 	dropdb river_dev --force --if-exists
 	createdb river_dev
 	cd cmd/river && go run . migrate-up --database-url "postgres://localhost/river_dev"
 
 .PHONY: db/reset/test
-db/reset/test: ## drop, create, and migrate test databases
+db/reset/test: ## Drop, create, and migrate test databases
 	go run ./internal/cmd/testdbman reset
 
+.PHONY: generate
+generate: ## Generate generated artifacts
+generate: generate/migrations
+generate: generate/sqlc
+
 .PHONY: generate/migrations
-generate/migrations: ## sync changes of pgxv5 migrations to database/sql
+generate/migrations: ## Sync changes of pgxv5 migrations to database/sql
 	rsync -au --delete "riverdriver/riverpgxv5/migration/" "riverdriver/riverdatabasesql/migration/"
 
 .PHONY: generate/sqlc
-generate/sqlc:
+generate/sqlc: ## Generate sqlc
 	cd riverdriver/riverdatabasesql/internal/dbsqlc && sqlc generate
 	cd riverdriver/riverpgxv5/internal/dbsqlc && sqlc generate
 
+# Looks at comments using ## on targets and uses them to produce a help output.
+.PHONY: help
+help: ALIGN=22
+help: ## Print this message
+	@awk -F '::? .*## ' -- "/^[^':]+::? .*## /"' { printf "'$$(tput bold)'%-$(ALIGN)s'$$(tput sgr0)' %s\n", $$1, $$2 }' $(MAKEFILE_LIST)
+
+# Each directory of a submodule in the Go workspace. Go commands provide no
+# built-in way to run for all workspace submodules. Add a new submodule to the
+# workspace with `go work use ./driver/new`.
+submodules := $(shell go list -f '{{.Dir}}' -m)
+
+# Definitions of following tasks look ugly, but they're done this way because to
+# produce the best/most comprehensible output by far (e.g. compared to a shell
+# loop).
 .PHONY: lint
-lint:
-	cd . && golangci-lint run --fix
-	cd cmd/river && golangci-lint run --fix
-	cd riverdriver && golangci-lint run --fix
-	cd riverdriver/riverdatabasesql && golangci-lint run --fix
-	cd riverdriver/riverpgxv5 && golangci-lint run --fix
-	cd rivershared && golangci-lint run --fix
-	cd rivertype && golangci-lint run --fix
+lint:: ## Run linter (golangci-lint) for all submodules
+define lint-target
+    lint:: ; cd $1 && golangci-lint run --fix
+endef
+$(foreach mod,$(submodules),$(eval $(call lint-target,$(mod))))
 
 .PHONY: test
-test:
-	cd . && go test ./... -p 1
-	cd cmd/river && go test ./...
-	cd riverdriver && go test ./...
-	cd riverdriver/riverdatabasesql && go test ./...
-	cd riverdriver/riverpgxv5 && go test ./...
-	cd rivershared && go test ./...
-	cd rivertype && go test ./...
+test:: ## Run test suite for all submodules
+define test-target
+    test:: ; cd $1 && go test ./... -p 1
+endef
+$(foreach mod,$(submodules),$(eval $(call test-target,$(mod))))
 
 .PHONY: tidy
-tidy:
-	cd . && go mod tidy
-	cd cmd/river && go mod tidy
-	cd riverdriver && go mod tidy
-	cd riverdriver/riverdatabasesql && go mod tidy
-	cd riverdriver/riverpgxv5 && go mod tidy
-	cd rivertype && go mod tidy
+tidy:: ## Run `go mod tidy` for all submodules
+define tidy-target
+    tidy:: ; cd $1 && go mod tidy
+endef
+$(foreach mod,$(submodules),$(eval $(call tidy-target,$(mod))))
+
+.PHONY: update-mod-go
+update-mod-go: ## Update `go`/`toolchain` directives in all submodules to match `go.work`
+	go run ./rivershared/cmd/update-mod-go ./go.work
+
+.PHONY: update-mod-version
+update-mod-version: ## Update River packages in all submodules to $VERSION
+	go run ./rivershared/cmd/update-mod-version ./go.work
 
 .PHONY: verify
-verify:
+verify: ## Verify generated artifacts
 verify: verify/migrations
 verify: verify/sqlc
 
 .PHONY: verify/migrations
-verify/migrations:
+verify/migrations: ## Verify synced migrations
 	diff -qr riverdriver/riverpgxv5/migration riverdriver/riverdatabasesql/migration
 
 .PHONY: verify/sqlc
-verify/sqlc:
+verify/sqlc: ## Verify generated sqlc
 	cd riverdriver/riverdatabasesql/internal/dbsqlc && sqlc diff
-	cd riverdriver/riverpgxv5/internal/dbsqlc && sqlc diff
\ No newline at end of file
+	cd riverdriver/riverpgxv5/internal/dbsqlc && sqlc diff
diff --git a/cmd/river/go.mod b/cmd/river/go.mod
index e575c895..a5edcad9 100644
--- a/cmd/river/go.mod
+++ b/cmd/river/go.mod
@@ -4,18 +4,6 @@ go 1.21
 
 toolchain go1.22.5
 
-// replace github.com/riverqueue/river => ../..
-
-// replace github.com/riverqueue/river/riverdriver => ../../riverdriver
-
-// replace github.com/riverqueue/river/riverdriver/riverdatabasesql => ../../riverdriver/riverdatabasesql
-
-// replace github.com/riverqueue/river/riverdriver/riverpgxv5 => ../../riverdriver/riverpgxv5
-
-// replace github.com/riverqueue/river/rivershared => ../../rivershared
-
-// replace github.com/riverqueue/river/rivertype => ../../rivertype
-
 require (
 	github.com/jackc/pgx/v5 v5.6.0
 	github.com/lmittmann/tint v1.0.4
diff --git a/docs/development.md b/docs/development.md
index 06076fcf..aecf1de8 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -30,7 +30,7 @@ queries. After changing an sqlc `.sql` file, generate Go with:
     ```shell
     git checkout master && git pull --rebase
     export VERSION=v0.x.y
-    go run ./internal/cmd/update-submodule-versions/main.go
+    make update-mod-version
     git checkout -b $USER-$VERSION
     ```
 
diff --git a/go.mod b/go.mod
index f9c58e78..826d19c1 100644
--- a/go.mod
+++ b/go.mod
@@ -4,16 +4,6 @@ go 1.21
 
 toolchain go1.22.5
 
-replace github.com/riverqueue/river/riverdriver => ./riverdriver
-
-replace github.com/riverqueue/river/riverdriver/riverpgxv5 => ./riverdriver/riverpgxv5
-
-replace github.com/riverqueue/river/riverdriver/riverdatabasesql => ./riverdriver/riverdatabasesql
-
-replace github.com/riverqueue/river/rivershared => ./rivershared
-
-replace github.com/riverqueue/river/rivertype => ./rivertype
-
 require (
 	github.com/jackc/pgerrcode v0.0.0-20220416144525-469b46aa5efa
 	github.com/jackc/pgx/v5 v5.6.0
@@ -26,7 +16,6 @@ require (
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/stretchr/testify v1.9.0
 	go.uber.org/goleak v1.3.0
-	golang.org/x/mod v0.20.0
 	golang.org/x/sync v0.8.0
 	golang.org/x/text v0.17.0
 )
diff --git a/go.sum b/go.sum
index e410aff6..facb6262 100644
--- a/go.sum
+++ b/go.sum
@@ -19,6 +19,16 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/riverqueue/river/riverdriver v0.11.2 h1:2xC+R0Y+CFEOSDWKyeFef0wqQLuvhk3PsLkos7MLa1w=
+github.com/riverqueue/river/riverdriver v0.11.2/go.mod h1:RhMuAjEtNGexwOFnz445G1iFNZVOnYQ90HDYxHMI+jM=
+github.com/riverqueue/river/riverdriver/riverdatabasesql v0.11.2 h1:I4ye1YEa35kqB6Jd3xVPNxbGDL6S1gpSTkZu25qffhc=
+github.com/riverqueue/river/riverdriver/riverdatabasesql v0.11.2/go.mod h1:+cOcD4U+8ugUeRZVTGqVhtScy0FS7LPyp+ZsoPIeoMI=
+github.com/riverqueue/river/riverdriver/riverpgxv5 v0.11.2 h1:yxFi09ECN02iAr2uO0n7QhFKAyyGZ+Rn9fzKTt2TGhk=
+github.com/riverqueue/river/riverdriver/riverpgxv5 v0.11.2/go.mod h1:ajPqIw7OgYBfR24MqH3VGI/SiYVgq0DkvdM7wrs+uDA=
+github.com/riverqueue/river/rivershared v0.11.2 h1:VbuLE6zm68R24xBi1elfnerhLBBn6X7DUxR9j4mcTR4=
+github.com/riverqueue/river/rivershared v0.11.2/go.mod h1:J4U3qm8MbjHY1o5OlRNiWaminYagec1o8sHYX4ZQ4S4=
+github.com/riverqueue/river/rivertype v0.11.2 h1:YREWOGxDMDe1DTdvttwr2DVq/ql65u6e4jkw3VxuNyU=
+github.com/riverqueue/river/rivertype v0.11.2/go.mod h1:bm5EMOGAEWhtXKqo27POWnViqSD5nHMZDP/jsrJc530=
 github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
 github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
@@ -32,8 +42,6 @@ go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
 golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
-golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
-golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
diff --git a/go.work b/go.work
new file mode 100644
index 00000000..ae23fdc4
--- /dev/null
+++ b/go.work
@@ -0,0 +1,13 @@
+go 1.21
+
+toolchain go1.22.5
+
+use (
+	.
+	./cmd/river
+	./riverdriver
+	./riverdriver/riverdatabasesql
+	./riverdriver/riverpgxv5
+	./rivershared
+	./rivertype
+)
diff --git a/go.work.sum b/go.work.sum
new file mode 100644
index 00000000..6876cb72
--- /dev/null
+++ b/go.work.sum
@@ -0,0 +1,38 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.3 h1:qMCsGGgs+MAzDFyp9LpAe1Lqy/fY/qCovCm0qnXZOBM=
+github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/kr/pty v1.1.1 h1:VkoXIwSboBpnk99O/KFauAEILuNHv5DVFKZMBN/gUgw=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/yuin/goldmark v1.4.13 h1:fVcFKWvrslecOb/tg+Cc05dkeYx540o0FuFt3nUVDoE=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
+golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
+golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
+golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2 h1:IRJeR9r1pYWsHKTRe/IInb7lYvbBVIqOgsX/u0mbOWY=
+golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
+golang.org/x/term v0.23.0 h1:F6D4vR+EHoL9/sWAWgAR1H2DcHr4PareCbAaCo1RpuU=
+golang.org/x/term v0.23.0/go.mod h1:DgV24QBUrK6jhZXl+20l6UWznPlwAHm1Q1mGHtydmSk=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+gopkg.in/errgo.v2 v2.1.0 h1:0vLT13EuvQ0hNvakwLuFZ/jYrLp5F3kcWHXdRggjCE8=
diff --git a/internal/cmd/update-submodule-versions/main_test.go b/internal/cmd/update-submodule-versions/main_test.go
deleted file mode 100644
index a1e9a775..00000000
--- a/internal/cmd/update-submodule-versions/main_test.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package main
-
-import (
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-	"golang.org/x/mod/modfile"
-	"golang.org/x/mod/module"
-)
-
-const sampleGoMod = `module github.com/riverqueue/river
-
-go 1.21.0
-
-replace github.com/riverqueue/river/riverdriver => ./riverdriver
-
-replace github.com/riverqueue/river/riverdriver/riverpgxv5 => ./riverdriver/riverpgxv5
-
-replace github.com/riverqueue/river/riverdriver/riverdatabasesql => ./riverdriver/riverdatabasesql
-
-require (
-	github.com/riverqueue/river/riverdriver v0.0.0-00010101000000-000000000000
-	github.com/riverqueue/river/riverdriver/riverdatabasesql v0.0.0-00010101000000-000000000000
-	github.com/riverqueue/river/riverdriver/riverpgxv5 v0.0.12
-)`
-
-func TestParseAndUpdateGoModFile(t *testing.T) {
-	t.Parallel()
-
-	file, err := os.CreateTemp("", "go.mod")
-	require.NoError(t, err)
-	t.Cleanup(func() { os.Remove(file.Name()) })
-
-	_, err = file.WriteString(sampleGoMod)
-	require.NoError(t, err)
-	require.NoError(t, file.Close())
-
-	anyChanges, err := parseAndUpdateGoModFile(file.Name(), "v0.0.13")
-	require.NoError(t, err)
-	require.True(t, anyChanges)
-
-	// Reread the file that the command above just wrote and make sure the right
-	// changes were made.
-	fileData, err := os.ReadFile(file.Name())
-	require.NoError(t, err)
-
-	modFile, err := modfile.Parse(file.Name(), fileData, nil)
-	require.NoError(t, err)
-
-	versions := make([]module.Version, 0, len(modFile.Require))
-	for _, require := range modFile.Require {
-		if require.Indirect || !strings.HasPrefix(require.Mod.Path, "github.com/riverqueue/river") {
-			continue
-		}
-
-		versions = append(versions, require.Mod)
-	}
-
-	require.Equal(t, []module.Version{
-		{Path: "github.com/riverqueue/river/riverdriver", Version: "v0.0.13"},
-		{Path: "github.com/riverqueue/river/riverdriver/riverdatabasesql", Version: "v0.0.13"},
-		{Path: "github.com/riverqueue/river/riverdriver/riverpgxv5", Version: "v0.0.13"},
-	}, versions)
-
-	// Running again is allowed and should be idempontent. This time it'll
-	// return that no changes were made.
-	anyChanges, err = parseAndUpdateGoModFile(file.Name(), "v0.0.13")
-	require.NoError(t, err)
-	require.False(t, anyChanges)
-}
diff --git a/riverdriver/go.mod b/riverdriver/go.mod
index b01459c4..ed56a0f8 100644
--- a/riverdriver/go.mod
+++ b/riverdriver/go.mod
@@ -4,6 +4,4 @@ go 1.21
 
 toolchain go1.22.5
 
-replace github.com/riverqueue/river/rivertype => ../rivertype
-
 require github.com/riverqueue/river/rivertype v0.11.2
diff --git a/riverdriver/go.sum b/riverdriver/go.sum
index 5496456e..d1cf6bd7 100644
--- a/riverdriver/go.sum
+++ b/riverdriver/go.sum
@@ -2,6 +2,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/riverqueue/river/rivertype v0.11.2 h1:YREWOGxDMDe1DTdvttwr2DVq/ql65u6e4jkw3VxuNyU=
+github.com/riverqueue/river/rivertype v0.11.2/go.mod h1:bm5EMOGAEWhtXKqo27POWnViqSD5nHMZDP/jsrJc530=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/riverdriver/riverdatabasesql/go.mod b/riverdriver/riverdatabasesql/go.mod
index f7f4e51f..dafe8090 100644
--- a/riverdriver/riverdatabasesql/go.mod
+++ b/riverdriver/riverdatabasesql/go.mod
@@ -4,12 +4,6 @@ go 1.21
 
 toolchain go1.22.5
 
-replace github.com/riverqueue/river/riverdriver => ../
-
-replace github.com/riverqueue/river/rivershared => ../../rivershared
-
-replace github.com/riverqueue/river/rivertype => ../../rivertype
-
 require (
 	github.com/lib/pq v1.10.9
 	github.com/riverqueue/river/riverdriver v0.11.2
diff --git a/riverdriver/riverdatabasesql/go.sum b/riverdriver/riverdatabasesql/go.sum
index e91f6125..b09415e8 100644
--- a/riverdriver/riverdatabasesql/go.sum
+++ b/riverdriver/riverdatabasesql/go.sum
@@ -9,6 +9,12 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/riverqueue/river/riverdriver v0.11.2 h1:2xC+R0Y+CFEOSDWKyeFef0wqQLuvhk3PsLkos7MLa1w=
+github.com/riverqueue/river/riverdriver v0.11.2/go.mod h1:RhMuAjEtNGexwOFnz445G1iFNZVOnYQ90HDYxHMI+jM=
+github.com/riverqueue/river/rivershared v0.11.2 h1:VbuLE6zm68R24xBi1elfnerhLBBn6X7DUxR9j4mcTR4=
+github.com/riverqueue/river/rivershared v0.11.2/go.mod h1:J4U3qm8MbjHY1o5OlRNiWaminYagec1o8sHYX4ZQ4S4=
+github.com/riverqueue/river/rivertype v0.11.2 h1:YREWOGxDMDe1DTdvttwr2DVq/ql65u6e4jkw3VxuNyU=
+github.com/riverqueue/river/rivertype v0.11.2/go.mod h1:bm5EMOGAEWhtXKqo27POWnViqSD5nHMZDP/jsrJc530=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
diff --git a/riverdriver/riverpgxv5/go.mod b/riverdriver/riverpgxv5/go.mod
index 8277c81a..578711b8 100644
--- a/riverdriver/riverpgxv5/go.mod
+++ b/riverdriver/riverpgxv5/go.mod
@@ -4,12 +4,6 @@ go 1.21
 
 toolchain go1.22.5
 
-replace github.com/riverqueue/river/riverdriver => ../
-
-replace github.com/riverqueue/river/rivershared => ../../rivershared
-
-replace github.com/riverqueue/river/rivertype => ../../rivertype
-
 require (
 	github.com/jackc/pgx/v5 v5.5.0
 	github.com/jackc/puddle/v2 v2.2.1
diff --git a/riverdriver/riverpgxv5/go.sum b/riverdriver/riverpgxv5/go.sum
index 1313bbe2..6435158d 100644
--- a/riverdriver/riverpgxv5/go.sum
+++ b/riverdriver/riverpgxv5/go.sum
@@ -16,6 +16,12 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/riverqueue/river/riverdriver v0.11.2 h1:2xC+R0Y+CFEOSDWKyeFef0wqQLuvhk3PsLkos7MLa1w=
+github.com/riverqueue/river/riverdriver v0.11.2/go.mod h1:RhMuAjEtNGexwOFnz445G1iFNZVOnYQ90HDYxHMI+jM=
+github.com/riverqueue/river/rivershared v0.11.2 h1:VbuLE6zm68R24xBi1elfnerhLBBn6X7DUxR9j4mcTR4=
+github.com/riverqueue/river/rivershared v0.11.2/go.mod h1:J4U3qm8MbjHY1o5OlRNiWaminYagec1o8sHYX4ZQ4S4=
+github.com/riverqueue/river/rivertype v0.11.2 h1:YREWOGxDMDe1DTdvttwr2DVq/ql65u6e4jkw3VxuNyU=
+github.com/riverqueue/river/rivertype v0.11.2/go.mod h1:bm5EMOGAEWhtXKqo27POWnViqSD5nHMZDP/jsrJc530=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
diff --git a/rivershared/cmd/update-mod-go/main.go b/rivershared/cmd/update-mod-go/main.go
new file mode 100644
index 00000000..15618058
--- /dev/null
+++ b/rivershared/cmd/update-mod-go/main.go
@@ -0,0 +1,124 @@
+// update-mod-go provides a command to help bump the `go/`toolchain` directives
+// in the `go.mod`s of River's internal dependencies across the project. It's
+// used to check that all directives match in CI, and to give us an easy way of
+// updating them all at once during upgrades.
+//
+// To check that directives match, run with `CHECK`:
+//
+//	CHECK=true make update-mod-go
+//
+// To upgrade a `go`/`toolchain` directive, change it in the workspace's
+// `go.work`, then run the program:
+//
+//	make update-mod-go
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path"
+
+	"golang.org/x/mod/modfile"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintf(os.Stderr, "failure: %s\n", err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	checkOnly := os.Getenv("CHECK") == "true"
+
+	if len(os.Args) != 2 {
+		return errors.New("expected exactly one arg, which should be the path to a go.work file")
+	}
+
+	workFilename := os.Args[1]
+
+	workFileData, err := os.ReadFile(workFilename)
+	if err != nil {
+		return fmt.Errorf("error reading file %q: %w", workFilename, err)
+	}
+
+	workFile, err := modfile.ParseWork(workFilename, workFileData, nil)
+	if err != nil {
+		return fmt.Errorf("error parsing file %q: %w", workFilename, err)
+	}
+
+	var (
+		workGoVersion     = workFile.Go.Version
+		workToolchainName = workFile.Toolchain.Name
+	)
+
+	for _, workUse := range workFile.Use {
+		if _, err := parseAndUpdateGoModFile(checkOnly, "./"+path.Join(workUse.Path, "go.mod"), workFilename, workGoVersion, workToolchainName); err != nil {
+			return err
+		}
+	}
+
+	if checkOnly {
+		fmt.Printf("go/toolchain directives in all go.mod files match workspace\n")
+	}
+
+	return nil
+}
+
+func parseAndUpdateGoModFile(checkOnly bool, modFilename, workFilename, workGoVersion, workToolchainName string) (bool, error) {
+	modFileData, err := os.ReadFile(modFilename)
+	if err != nil {
+		return false, fmt.Errorf("error reading file %q: %w", modFilename, err)
+	}
+
+	modFile, err := modfile.Parse(modFilename, modFileData, nil)
+	if err != nil {
+		return false, fmt.Errorf("error parsing file %q: %w", modFilename, err)
+	}
+
+	var anyMismatch bool
+
+	fmt.Printf("%s\n", modFilename)
+
+	if workGoVersion != modFile.Go.Version {
+		if checkOnly {
+			return false, fmt.Errorf("go directive of %q (%s) doesn't match %q (%s)", modFilename, modFile.Go.Version, workFilename, workGoVersion)
+		}
+
+		anyMismatch = true
+		if err := modFile.AddGoStmt(workGoVersion); err != nil {
+			return false, fmt.Errorf("error adding go statement: %w", err)
+		}
+		fmt.Printf("    set go to %s for %s\n", workGoVersion, modFilename)
+	}
+
+	if workToolchainName != modFile.Toolchain.Name {
+		if checkOnly {
+			return false, fmt.Errorf("toolchain directive of %q (%s) doesn't match %q (%s)", modFilename, modFile.Toolchain.Name, workFilename, workToolchainName)
+		}
+
+		anyMismatch = true
+		if err := modFile.AddToolchainStmt(workToolchainName); err != nil {
+			return false, fmt.Errorf("error adding toolchain statement: %w", err)
+		}
+		fmt.Printf("    set toolchain to %s for %s\n", workToolchainName, modFilename)
+	}
+
+	if !checkOnly {
+		if anyMismatch {
+			updatedFileData, err := modFile.Format()
+			if err != nil {
+				return false, fmt.Errorf("error formatting file %q after update: %w", modFilename, err)
+			}
+
+			if err := os.WriteFile(modFilename, updatedFileData, 0o600); err != nil {
+				return false, fmt.Errorf("error writing file %q after update: %w", modFilename, err)
+			}
+		} else {
+			fmt.Printf("    no changes\n")
+		}
+	}
+
+	return anyMismatch, nil
+}
diff --git a/rivershared/cmd/update-mod-go/main_test.go b/rivershared/cmd/update-mod-go/main_test.go
new file mode 100644
index 00000000..7ec6e08b
--- /dev/null
+++ b/rivershared/cmd/update-mod-go/main_test.go
@@ -0,0 +1,118 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"golang.org/x/mod/modfile"
+)
+
+const sampleGoMod = `module github.com/riverqueue/river
+
+go 1.21
+
+toolchain go1.22.5
+
+require (
+	github.com/riverqueue/river/riverdriver v0.0.0-00010101000000-000000000000
+	github.com/riverqueue/river/riverdriver/riverdatabasesql v0.0.0-00010101000000-000000000000
+	github.com/riverqueue/river/riverdriver/riverpgxv5 v0.0.12
+)`
+
+func TestParseAndUpdateGoModFile(t *testing.T) {
+	t.Parallel()
+
+	type testBundle struct{}
+
+	setup := func(t *testing.T) (string, *testBundle) { //nolint:unparam
+		t.Helper()
+
+		file, err := os.CreateTemp("", "go.mod")
+		require.NoError(t, err)
+		t.Cleanup(func() { os.Remove(file.Name()) })
+
+		_, err = file.WriteString(sampleGoMod)
+		require.NoError(t, err)
+		require.NoError(t, file.Close())
+
+		return file.Name(), &testBundle{}
+	}
+
+	requireDirectives := func(t *testing.T, filename, goVersion, toolchainName string) {
+		t.Helper()
+
+		fileData, err := os.ReadFile(filename)
+		require.NoError(t, err)
+
+		modFile, err := modfile.Parse(filename, fileData, nil)
+		require.NoError(t, err)
+
+		require.Equal(t, goVersion, modFile.Go.Version)
+		require.Equal(t, toolchainName, modFile.Toolchain.Name)
+	}
+
+	t.Run("WritesChanges", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		anyMismatch, err := parseAndUpdateGoModFile(false, filename, "go.work", "1.22", "go1.22.6")
+		require.NoError(t, err)
+		require.True(t, anyMismatch)
+
+		// Reread the file that the command above just wrote and make sure the right
+		// changes were made.
+		requireDirectives(t, filename, "1.22", "go1.22.6")
+
+		// Running again is allowed and should be idempontent. This time it'll
+		// return that no changes were made.
+		anyMismatch, err = parseAndUpdateGoModFile(false, filename, "go.work", "1.22", "go1.22.6")
+		require.NoError(t, err)
+		require.False(t, anyMismatch)
+	})
+
+	t.Run("NoChanges", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		anyMismatch, err := parseAndUpdateGoModFile(false, filename, "go.work", "1.21", "go1.22.5")
+		require.NoError(t, err)
+		require.False(t, anyMismatch)
+
+		// Expect no changes made in file.
+		requireDirectives(t, filename, "1.21", "go1.22.5")
+	})
+
+	t.Run("CheckOnlyGoMismatch", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		_, err := parseAndUpdateGoModFile(true, filename, "go.work", "1.22", "go1.22.5")
+		require.EqualError(t, err, fmt.Sprintf("go directive of %q (%s) doesn't match %q (%s)", filename, "1.21", "go.work", "1.22"))
+	})
+
+	t.Run("CheckOnlyToolchainMismatch", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		_, err := parseAndUpdateGoModFile(true, filename, "go.work", "1.21", "go1.22.6")
+		require.EqualError(t, err, fmt.Sprintf("toolchain directive of %q (%s) doesn't match %q (%s)", filename, "go1.22.5", "go.work", "go1.22.6"))
+	})
+
+	t.Run("CheckOnlyNoChanges", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		anyMismatch, err := parseAndUpdateGoModFile(true, filename, "go.work", "1.21", "go1.22.5")
+		require.NoError(t, err)
+		require.False(t, anyMismatch)
+
+		requireDirectives(t, filename, "1.21", "go1.22.5")
+	})
+}
diff --git a/internal/cmd/update-submodule-versions/main.go b/rivershared/cmd/update-mod-version/main.go
similarity index 66%
rename from internal/cmd/update-submodule-versions/main.go
rename to rivershared/cmd/update-mod-version/main.go
index 6ca15c8d..f5d45b31 100644
--- a/internal/cmd/update-submodule-versions/main.go
+++ b/rivershared/cmd/update-mod-version/main.go
@@ -1,6 +1,10 @@
-// Package main provides a command to help bump the versions of River's internal
-// dependencies in the `go.mod` files of submodules across the project. It's
-// used to make the release process less error prone and less painful.
+// update-mod-version provides a command to help bump the versions of River's
+// internal dependencies in the `go.mod` files of submodules across the project.
+// It's used to make the release process less error prone and less painful.
+//
+// Run it with a make target:
+//
+//	VERSION=v0.x.y make update-mod-version
 package main
 
 import (
@@ -14,23 +18,9 @@ import (
 	"golang.org/x/mod/semver"
 )
 
-// Notably, `./cmd/river` is excluded from this list. Unlike the other modules,
-// it doesn't use `replace` directives so that it can stay installable with `go
-// install ...@latest`. Without `replace`, dependencies need a hard lock in
-// `go.sum`, so any changes to its `go.mod` file would require a `go mod tidy`
-// be run afterwards.
-var allProjectModules = []string{ //nolint:gochecknoglobals
-	".",
-	"./riverdriver",
-	"./riverdriver/riverdatabasesql",
-	"./riverdriver/riverpgxv5",
-	"./rivershared",
-	"./rivertype",
-}
-
 func main() {
 	if err := run(); err != nil {
-		fmt.Fprintf(os.Stderr, "failure: %s", err)
+		fmt.Fprintf(os.Stderr, "failure: %s\n", err)
 		os.Exit(1)
 	}
 }
@@ -45,8 +35,24 @@ func run() error {
 		return fmt.Errorf("invalid semver version: %s", version)
 	}
 
-	for _, dir := range allProjectModules {
-		if _, err := parseAndUpdateGoModFile(path.Join(dir, "go.mod"), version); err != nil {
+	if len(os.Args) != 2 {
+		return errors.New("expected exactly one arg, which should be the path to a go.work file")
+	}
+
+	workFilename := os.Args[1]
+
+	workFileData, err := os.ReadFile(workFilename)
+	if err != nil {
+		return fmt.Errorf("error reading file %q: %w", workFilename, err)
+	}
+
+	workFile, err := modfile.ParseWork(workFilename, workFileData, nil)
+	if err != nil {
+		return fmt.Errorf("error parsing file %q: %w", workFilename, err)
+	}
+
+	for _, workUse := range workFile.Use {
+		if _, err := parseAndUpdateGoModFile("./"+path.Join(workUse.Path, "go.mod"), version); err != nil {
 			return err
 		}
 	}
diff --git a/rivershared/cmd/update-mod-version/main_test.go b/rivershared/cmd/update-mod-version/main_test.go
new file mode 100644
index 00000000..a54843f1
--- /dev/null
+++ b/rivershared/cmd/update-mod-version/main_test.go
@@ -0,0 +1,82 @@
+package main
+
+import (
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"golang.org/x/mod/modfile"
+	"golang.org/x/mod/module"
+)
+
+const sampleGoMod = `module github.com/riverqueue/river
+
+go 1.21
+
+toolchain go1.22.5
+
+require (
+	github.com/riverqueue/river/riverdriver v0.0.0-00010101000000-000000000000
+	github.com/riverqueue/river/riverdriver/riverdatabasesql v0.0.0-00010101000000-000000000000
+	github.com/riverqueue/river/riverdriver/riverpgxv5 v0.0.12
+)`
+
+func TestParseAndUpdateGoModFile(t *testing.T) {
+	t.Parallel()
+
+	type testBundle struct{}
+
+	setup := func(t *testing.T) (string, *testBundle) {
+		t.Helper()
+
+		file, err := os.CreateTemp("", "go.mod")
+		require.NoError(t, err)
+		t.Cleanup(func() { os.Remove(file.Name()) })
+
+		_, err = file.WriteString(sampleGoMod)
+		require.NoError(t, err)
+		require.NoError(t, file.Close())
+
+		return file.Name(), &testBundle{}
+	}
+
+	t.Run("WritesChanges", func(t *testing.T) {
+		t.Parallel()
+
+		filename, _ := setup(t)
+
+		anyChanges, err := parseAndUpdateGoModFile(filename, "v0.0.13")
+		require.NoError(t, err)
+		require.True(t, anyChanges)
+
+		// Reread the file that the command above just wrote and make sure the right
+		// changes were made.
+		fileData, err := os.ReadFile(filename)
+		require.NoError(t, err)
+
+		modFile, err := modfile.Parse(filename, fileData, nil)
+		require.NoError(t, err)
+
+		versions := make([]module.Version, 0, len(modFile.Require))
+		for _, require := range modFile.Require {
+			if require.Indirect || !strings.HasPrefix(require.Mod.Path, "github.com/riverqueue/river") {
+				continue
+			}
+
+			versions = append(versions, require.Mod)
+		}
+
+		require.Equal(t, []module.Version{
+			{Path: "github.com/riverqueue/river/riverdriver", Version: "v0.0.13"},
+			{Path: "github.com/riverqueue/river/riverdriver/riverdatabasesql", Version: "v0.0.13"},
+			{Path: "github.com/riverqueue/river/riverdriver/riverpgxv5", Version: "v0.0.13"},
+		}, versions)
+
+		// Running again is allowed and should be idempontent. This time it'll
+		// return that no changes were made.
+		anyChanges, err = parseAndUpdateGoModFile(filename, "v0.0.13")
+		require.NoError(t, err)
+		require.False(t, anyChanges)
+	})
+}
diff --git a/rivershared/go.mod b/rivershared/go.mod
index a9ebe018..86d93d0a 100644
--- a/rivershared/go.mod
+++ b/rivershared/go.mod
@@ -7,6 +7,7 @@ toolchain go1.22.5
 require (
 	github.com/stretchr/testify v1.9.0
 	go.uber.org/goleak v1.3.0
+	golang.org/x/mod v0.9.0
 )
 
 require (
diff --git a/rivershared/go.sum b/rivershared/go.sum
index 39549b18..e03f7242 100644
--- a/rivershared/go.sum
+++ b/rivershared/go.sum
@@ -18,6 +18,8 @@ github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsT
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+golang.org/x/mod v0.9.0 h1:KENHtAZL2y3NLMYZeHY9DW8HW8V+kQyJsY/V9JlKvCs=
+golang.org/x/mod v0.9.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=