diff --git a/lib/qiniu/version.rb b/lib/qiniu/version.rb
index ecfd591..efd4b95 100755
--- a/lib/qiniu/version.rb
+++ b/lib/qiniu/version.rb
@@ -4,7 +4,7 @@ module Qiniu
     module Version
       MAJOR = 6
       MINOR = 2
-      PATCH = 3
+      PATCH = 4
       # Returns a version string by joining <tt>MAJOR</tt>, <tt>MINOR</tt>, and <tt>PATCH</tt> with <tt>'.'</tt>
       #
       # Example