diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 1cd69bcc..1c9b389e 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -2,7 +2,7 @@
 	".github/actions/happy-cleanup": "1.9.1",
 	".github/actions/conventional-commits": "1.6.0",
 	".github/actions/docker-build-push": "1.6.2",
-	".": "3.6.1",
+	".": "4.0.0",
 	".github/actions/install-happy": "1.7.1",
 	".github/actions/deploy-happy-stack": "2.2.0",
 	".github/actions/get-github-ref-names": "1.6.0",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89d2af09..36dc696b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## [4.0.0](https://github.com/chanzuckerberg/github-actions/compare/v3.6.1...v4.0.0) (2025-01-27)
+
+
+### ⚠ BREAKING CHANGES
+
+* CCIE-3896 rename CZI_GITHUB_HELPER_* to GH_ACTIONS_HELPER_* ([#333](https://github.com/chanzuckerberg/github-actions/issues/333))
+
+### Features
+
+* CCIE-3896 rename CZI_GITHUB_HELPER_* to GH_ACTIONS_HELPER_* ([#333](https://github.com/chanzuckerberg/github-actions/issues/333)) ([f53ac72](https://github.com/chanzuckerberg/github-actions/commit/f53ac72b29a9d435f6c4f177a5beaa423842f3e5))
+
+
+### Misc
+
+* CCIE-3899 use build-prep@3.6.1 ([#335](https://github.com/chanzuckerberg/github-actions/issues/335)) ([8d3d492](https://github.com/chanzuckerberg/github-actions/commit/8d3d492c470de3394b3b20be0caac66405eeb222))
+* fix build-prep tag ([#337](https://github.com/chanzuckerberg/github-actions/issues/337)) ([64ab808](https://github.com/chanzuckerberg/github-actions/commit/64ab8080958b220ebf87692510bd907e911721f4))
+
 ## [3.6.1](https://github.com/chanzuckerberg/github-actions/compare/v3.6.0...v3.6.1) (2025-01-24)
 
 
diff --git a/version.txt b/version.txt
index 9575d51b..fcdb2e10 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.6.1
+4.0.0