diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35c0f3e3..ee29c094 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,25 +1,4 @@
-# [5.2.0-beta.2](https://github.com/kaitranntt/ccs/compare/v5.2.0-beta.1...v5.2.0-beta.2) (2025-12-01)
-
-
-### Features
-
-* **cliproxy:** auto-update cliproxyapi to latest release on startup ([8873ccd](https://github.com/kaitranntt/ccs/commit/8873ccd981679e8acff8965accdc22215c6e4aa2))
-
-# [5.2.0-beta.1](https://github.com/kaitranntt/ccs/compare/v5.1.1-beta.3...v5.2.0-beta.1) (2025-12-01)
-
-
-### Features
-
-* **cliproxy:** add qwen code oauth provider support ([#31](https://github.com/kaitranntt/ccs/issues/31)) ([a3f1e52](https://github.com/kaitranntt/ccs/commit/a3f1e52ac68600ba0806d67aacceb6477ffa3543)), closes [#29](https://github.com/kaitranntt/ccs/issues/29)
-
-## [5.1.1-beta.3](https://github.com/kaitranntt/ccs/compare/v5.1.1-beta.2...v5.1.1-beta.3) (2025-12-01)
-
-
-### Bug Fixes
-
-* **glmt:** handle 401 errors and headers-already-sent exception ([#30](https://github.com/kaitranntt/ccs/issues/30)) ([c953382](https://github.com/kaitranntt/ccs/commit/c95338232a37981b95b785b47185ce18d6d94b7a)), closes [#26](https://github.com/kaitranntt/ccs/issues/26)
-
-## [5.1.1-beta.2](https://github.com/kaitranntt/ccs/compare/v5.1.1-beta.1...v5.1.1-beta.2) (2025-12-01)
+## [5.1.1](https://github.com/kaitranntt/ccs/compare/v5.1.0...v5.1.1) (2025-12-01)
 
 
 ### Bug Fixes
diff --git a/VERSION b/VERSION
index fb5aaee2..ac14c3df 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.2.0-beta.2
+5.1.1
diff --git a/installers/install.ps1 b/installers/install.ps1
index 03bdde1a..e44c3d95 100644
--- a/installers/install.ps1
+++ b/installers/install.ps1
@@ -83,7 +83,7 @@ $InstallMethod = if ($ScriptDir -and ((Test-Path "$ScriptDir\lib\ccs.ps1") -or (
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (irm | iex)
 # For git installations, VERSION file is read if available
-$CcsVersion = "5.2.0-beta.2"
+$CcsVersion = "5.1.1"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
diff --git a/installers/install.sh b/installers/install.sh
index 7d0b1c67..54f56437 100755
--- a/installers/install.sh
+++ b/installers/install.sh
@@ -84,7 +84,7 @@ fi
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (curl | bash)
 # For git installations, VERSION file is read if available
-CCS_VERSION="5.2.0-beta.2"
+CCS_VERSION="5.1.1"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
diff --git a/package.json b/package.json
index c51ca2ba..8fe80e67 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "5.2.0-beta.2",
+  "version": "5.1.1",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",