diff --git a/CHANGELOG.md b/CHANGELOG.md
index 049b18a..681e4ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+2.5.34
+-------
+
+- Fix session invalid warning, only for development env;
+
 2.5.2
 -------
 
diff --git a/Gemfile.lock b/Gemfile.lock
index ce41916..1f5e6c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rucaptcha (2.5.2)
+    rucaptcha (2.5.3)
       railties (>= 3.2)
 
 GEM
diff --git a/lib/rucaptcha/version.rb b/lib/rucaptcha/version.rb
index 8a1bd15..085c99f 100644
--- a/lib/rucaptcha/version.rb
+++ b/lib/rucaptcha/version.rb
@@ -1,3 +1,3 @@
 module RuCaptcha
-  VERSION = '2.5.2'
+  VERSION = '2.5.3'
 end