diff --git a/CHANGELOG.md b/CHANGELOG.md
index b987f0a2..165ad30b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [5.1.1-beta.1](https://github.com/kaitranntt/ccs/compare/v5.1.0...v5.1.1-beta.1) (2025-12-01)
+
+
+### Bug Fixes
+
+* **cliproxy:** use double-dash flags for cliproxyapi auth ([#24](https://github.com/kaitranntt/ccs/issues/24)) ([4c81f28](https://github.com/kaitranntt/ccs/commit/4c81f28f0b67ef92cf74d0f5c13a5943ff0a7f00))
+
 # [5.1.0](https://github.com/kaitranntt/ccs/compare/v5.0.2...v5.1.0) (2025-12-01)
 
 
diff --git a/VERSION b/VERSION
index 831446cb..e28d5cc2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.1.0
+5.1.1-beta.1
diff --git a/installers/install.ps1 b/installers/install.ps1
index 60b1bb21..50a22495 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 = "5.1.0"
+$CcsVersion = "5.1.1-beta.1"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
diff --git a/installers/install.sh b/installers/install.sh
index a496e278..9489891d 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="5.1.0"
+CCS_VERSION="5.1.1-beta.1"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
diff --git a/package.json b/package.json
index 6a22583d..bd0cc458 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "5.1.0",
+  "version": "5.1.1-beta.1",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",