diff --git a/lib/__tests__/cookieJar.spec.ts b/lib/__tests__/cookieJar.spec.ts
index 52c240f3..6999c86c 100644
--- a/lib/__tests__/cookieJar.spec.ts
+++ b/lib/__tests__/cookieJar.spec.ts
@@ -980,7 +980,7 @@ describe('CookieJar', () => {
           prefixSecurity: 'silent',
           rejectPublicSuffixes: true,
           storeType: 'MemoryCookieStore',
-          version: 'tough-cookie@5.0.0',
+          version: 'tough-cookie@5.0.0-rc.0',
         }
         expect(data).toEqual(expected)
       },
diff --git a/lib/__tests__/jarSerialization.spec.ts b/lib/__tests__/jarSerialization.spec.ts
index cd9c3a33..ff2b3ddc 100644
--- a/lib/__tests__/jarSerialization.spec.ts
+++ b/lib/__tests__/jarSerialization.spec.ts
@@ -39,7 +39,7 @@ jest.useFakeTimers()
 
 describe('cookieJar serialization', () => {
   it('should use the expected version', () => {
-    expect(version).toBe('5.0.0')
+    expect(version).toBe('5.0.0-rc.0')
   })
 
   it('should provide the list of serialized properties available for a Cookie with `Cookie.serializableProperties`', () => {
diff --git a/lib/version.ts b/lib/version.ts
index aa8cf9b4..7bb77937 100644
--- a/lib/version.ts
+++ b/lib/version.ts
@@ -1,2 +1,2 @@
 // Generated by genversion.
-export const version = '5.0.0'
+export const version = '5.0.0-rc.0'
diff --git a/package-lock.json b/package-lock.json
index 167bf701..1e988548 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "tough-cookie",
-  "version": "5.0.0",
+  "version": "5.0.0-rc.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "tough-cookie",
-      "version": "5.0.0",
+      "version": "5.0.0-rc.0",
       "license": "BSD-3-Clause",
       "dependencies": {
         "psl": "^1.1.33",
diff --git a/package.json b/package.json
index 8809e814..0847efc9 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "RFC6265",
     "RFC2965"
   ],
-  "version": "5.0.0",
+  "version": "5.0.0-rc.0",
   "homepage": "https://github.com/salesforce/tough-cookie",
   "repository": {
     "type": "git",