diff --git a/lerna.json b/lerna.json
index a73b1b0c7..82d9f119f 100644
--- a/lerna.json
+++ b/lerna.json
@@ -3,5 +3,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "4.0.0-beta.2"
+  "version": "4.0.0-rc.0"
 }
diff --git a/packages/workbox-background-sync/package.json b/packages/workbox-background-sync/package.json
index 65d65a321..f2953308a 100644
--- a/packages/workbox-background-sync/package.json
+++ b/packages/workbox-background-sync/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-background-sync",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "Queues failed requests and uses the Background Sync API to replay them when the network is available",
@@ -27,6 +27,6 @@
   "main": "build/workbox-background-sync.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-broadcast-update/package.json b/packages/workbox-broadcast-update/package.json
index bfa17e827..7a5453e99 100644
--- a/packages/workbox-broadcast-update/package.json
+++ b/packages/workbox-broadcast-update/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-broadcast-update",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "A service worker helper library that uses the Broadcast Channel API to announce when a cached response has updated",
@@ -25,6 +25,6 @@
   "main": "build/workbox-broadcast-update.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-build/package.json b/packages/workbox-build/package.json
index 1c0bd43e8..6290b208e 100644
--- a/packages/workbox-build/package.json
+++ b/packages/workbox-build/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-build",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "description": "A module that integrates into your build process, helping you generate a manifest of local files that workbox-sw should precache.",
   "keywords": [
     "workbox",
@@ -29,20 +29,20 @@
     "pretty-bytes": "^4.0.2",
     "stringify-object": "^3.2.2",
     "strip-comments": "^1.0.2",
-    "workbox-background-sync": "^4.0.0-beta.2",
-    "workbox-broadcast-update": "^4.0.0-beta.2",
-    "workbox-expiration": "^4.0.0-beta.2",
-    "workbox-cacheable-response": "^4.0.0-beta.2",
-    "workbox-core": "^4.0.0-beta.2",
-    "workbox-google-analytics": "^4.0.0-beta.2",
-    "workbox-navigation-preload": "^4.0.0-beta.2",
-    "workbox-precaching": "^4.0.0-beta.2",
-    "workbox-range-requests": "^4.0.0-beta.2",
-    "workbox-routing": "^4.0.0-beta.2",
-    "workbox-strategies": "^4.0.0-beta.2",
-    "workbox-streams": "^4.0.0-beta.2",
-    "workbox-sw": "^4.0.0-beta.2",
-    "workbox-window": "^4.0.0-beta.2"
+    "workbox-background-sync": "^4.0.0-rc.0",
+    "workbox-broadcast-update": "^4.0.0-rc.0",
+    "workbox-cacheable-response": "^4.0.0-rc.0",
+    "workbox-core": "^4.0.0-rc.0",
+    "workbox-expiration": "^4.0.0-rc.0",
+    "workbox-google-analytics": "^4.0.0-rc.0",
+    "workbox-navigation-preload": "^4.0.0-rc.0",
+    "workbox-precaching": "^4.0.0-rc.0",
+    "workbox-range-requests": "^4.0.0-rc.0",
+    "workbox-routing": "^4.0.0-rc.0",
+    "workbox-strategies": "^4.0.0-rc.0",
+    "workbox-streams": "^4.0.0-rc.0",
+    "workbox-sw": "^4.0.0-rc.0",
+    "workbox-window": "^4.0.0-rc.0"
   },
   "main": "build/index.js",
   "scripts": {
diff --git a/packages/workbox-cacheable-response/package.json b/packages/workbox-cacheable-response/package.json
index 7ff196ffe..4181bfae9 100755
--- a/packages/workbox-cacheable-response/package.json
+++ b/packages/workbox-cacheable-response/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-cacheable-response",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This library takes a Response object and determines whether it's cacheable based on a specific configuration.",
@@ -25,6 +25,6 @@
   "main": "build/workbox-cacheable-response.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-cli/package.json b/packages/workbox-cli/package.json
index 506cdbffc..6c29cdd81 100644
--- a/packages/workbox-cli/package.json
+++ b/packages/workbox-cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-cli",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "description": "workbox-cli is the command line interface for Workbox.",
   "keywords": [
     "workbox",
@@ -40,7 +40,7 @@
     "ora": "^3.0.0",
     "pretty-bytes": "^5.1.0",
     "update-notifier": "^2.5.0",
-    "workbox-build": "^4.0.0-beta.2"
+    "workbox-build": "^4.0.0-rc.0"
   },
   "workbox": {
     "packageType": "node"
diff --git a/packages/workbox-core/package.json b/packages/workbox-core/package.json
index 9c228ee97..b8682ac33 100644
--- a/packages/workbox-core/package.json
+++ b/packages/workbox-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-core",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This module is used by a number of the other Workbox modules to share common code.",
diff --git a/packages/workbox-expiration/package.json b/packages/workbox-expiration/package.json
index a8a392d99..4a73d2150 100644
--- a/packages/workbox-expiration/package.json
+++ b/packages/workbox-expiration/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-expiration",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "A service worker helper library that expires cached responses based on age or maximum number of entries.",
@@ -25,6 +25,6 @@
   "main": "build/workbox-expiration.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-google-analytics/package.json b/packages/workbox-google-analytics/package.json
index c1f383539..9344f3dff 100644
--- a/packages/workbox-google-analytics/package.json
+++ b/packages/workbox-google-analytics/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-google-analytics",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "Queues failed requests and uses the Background Sync API to replay them when the network is available",
@@ -29,9 +29,9 @@
   "main": "build/workbox-offline-ga.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-background-sync": "^4.0.0-beta.2",
-    "workbox-core": "^4.0.0-beta.2",
-    "workbox-routing": "^4.0.0-beta.2",
-    "workbox-strategies": "^4.0.0-beta.2"
+    "workbox-background-sync": "^4.0.0-rc.0",
+    "workbox-core": "^4.0.0-rc.0",
+    "workbox-routing": "^4.0.0-rc.0",
+    "workbox-strategies": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-navigation-preload/package.json b/packages/workbox-navigation-preload/package.json
index 79ef6523c..a368a0c6c 100755
--- a/packages/workbox-navigation-preload/package.json
+++ b/packages/workbox-navigation-preload/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-navigation-preload",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This library allows developers to opt-in to using Navigation Preload in their service worker.",
@@ -26,6 +26,6 @@
   "main": "build/workbox-navigation-preload.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-precaching/package.json b/packages/workbox-precaching/package.json
index c8dab9d93..69bdd11a6 100644
--- a/packages/workbox-precaching/package.json
+++ b/packages/workbox-precaching/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-precaching",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This module efficiently precaches assets.",
@@ -25,6 +25,6 @@
   "main": "build/workbox-precaching.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-range-requests/package.json b/packages/workbox-range-requests/package.json
index 0eba121b5..404121d21 100755
--- a/packages/workbox-range-requests/package.json
+++ b/packages/workbox-range-requests/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-range-requests",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This library creates a new Response, given a source Response and a Range header value.",
@@ -29,6 +29,6 @@
   "main": "build/workbox-range-requests.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-routing/package.json b/packages/workbox-routing/package.json
index a1543449f..f0a1599be 100644
--- a/packages/workbox-routing/package.json
+++ b/packages/workbox-routing/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-routing",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "A service worker helper library to route request URLs to handlers.",
@@ -27,6 +27,6 @@
   "main": "build/workbox-routing.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-strategies/package.json b/packages/workbox-strategies/package.json
index a3838d7c0..ef7560c5c 100644
--- a/packages/workbox-strategies/package.json
+++ b/packages/workbox-strategies/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-strategies",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "A service worker helper library implementing common caching strategies.",
@@ -27,6 +27,6 @@
   "main": "build/workbox-strategies.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-streams/package.json b/packages/workbox-streams/package.json
index e622731da..0ac72e9e4 100644
--- a/packages/workbox-streams/package.json
+++ b/packages/workbox-streams/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-streams",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "A library that makes it easier to work with Streams in the browser.",
@@ -27,6 +27,6 @@
   "main": "build/workbox-streams.prod.js",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }
diff --git a/packages/workbox-sw/package.json b/packages/workbox-sw/package.json
index 8bfba179b..a2bfdcfc7 100644
--- a/packages/workbox-sw/package.json
+++ b/packages/workbox-sw/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-sw",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "This module makes it easy to get started with the Workbox service worker libraries.",
diff --git a/packages/workbox-webpack-plugin/package.json b/packages/workbox-webpack-plugin/package.json
index 0c3b7f474..405fd87e3 100644
--- a/packages/workbox-webpack-plugin/package.json
+++ b/packages/workbox-webpack-plugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-webpack-plugin",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "description": "A plugin for your Webpack build process, helping you generate a manifest of local files that workbox-sw should precache.",
   "keywords": [
     "workbox",
@@ -30,7 +30,7 @@
   "dependencies": {
     "@babel/runtime": "^7.0.0",
     "json-stable-stringify": "^1.0.1",
-    "workbox-build": "^4.0.0-beta.2"
+    "workbox-build": "^4.0.0-rc.0"
   },
   "peerDependencies": {
     "webpack": "^2.0.0 || ^3.0.0 || ^4.0.0"
diff --git a/packages/workbox-window/package.json b/packages/workbox-window/package.json
index 1d58802f5..cfbf68b58 100644
--- a/packages/workbox-window/package.json
+++ b/packages/workbox-window/package.json
@@ -1,6 +1,6 @@
 {
   "name": "workbox-window",
-  "version": "4.0.0-beta.2",
+  "version": "4.0.0-rc.0",
   "license": "MIT",
   "author": "Google's Web DevRel Team",
   "description": "Simplifies communications with Workbox packages running in the service worker",
@@ -27,6 +27,6 @@
   "main": "build/workbox-window.prod.mjs",
   "module": "index.mjs",
   "dependencies": {
-    "workbox-core": "^4.0.0-beta.2"
+    "workbox-core": "^4.0.0-rc.0"
   }
 }