diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7139ded3..c304c6b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+# [6.4.0](https://github.com/kaitranntt/ccs/compare/v6.3.1...v6.4.0) (2025-12-18)
+
+
+### Bug Fixes
+
+* **websearch:** detect Gemini CLI auth status before showing Ready ([98c21ef](https://github.com/kaitranntt/ccs/commit/98c21efb5a3b7a39b27fda958691837545235f2d))
+
+
+### Features
+
+* **cliproxy:** implement interactive project selection for OAuth flows ([a66abba](https://github.com/kaitranntt/ccs/commit/a66abba174eb77555b4443f3e930be30264da7e4))
+
 ## [6.3.1](https://github.com/kaitranntt/ccs/compare/v6.3.0...v6.3.1) (2025-12-18)
 
 
diff --git a/VERSION b/VERSION
index 4d4c69df..19b860c1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.3.1-dev.3
+6.4.0
diff --git a/installers/install.ps1 b/installers/install.ps1
index 75138fcc..491ff4d4 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 = "6.3.1"
+$CcsVersion = "6.4.0"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
diff --git a/installers/install.sh b/installers/install.sh
index 8d74aa7a..296acad7 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="6.3.1"
+CCS_VERSION="6.4.0"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
diff --git a/package.json b/package.json
index 84c75c52..578103e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "6.3.1-dev.3",
+  "version": "6.4.0",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",