diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 30f3ebe..f8317b2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: 1.18
+          go-version: "1.20"
       - run: go test -p 1 ./...
   lint:
     runs-on: ubuntu-latest
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: 1.18
+          go-version: "1.20"
       - name: staticcheck
         uses: dominikh/staticcheck-action@v1.3.0
         with:
@@ -30,6 +30,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: 1.18
+          go-version: "1.20"
       - name: Run the quality checker (which catches obvious mistakes, missing docs, etc.)
         run: go run ./.github/quality-checker
diff --git a/go.mod b/go.mod
index 0b4f9fb..7704276 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/googleapis/api-linter
 
-go 1.18
+go 1.20
 
 require (
 	bitbucket.org/creachadair/stringset v0.0.11