diff --git a/VERSION b/VERSION
index 024b066c..457c8636 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.2.1
+6.2.1-dev.1
diff --git a/package.json b/package.json
index 9c7bf112..b9799117 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "6.2.1",
+  "version": "6.2.1-dev.1",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",