diff --git a/CHANGELOG.md b/CHANGELOG.md
index a141793..d8aa907 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+0.3.3
+-----
+
+- Add `config.expires_in` to allow change captcha code expire time.
+
 0.3.2.1
 -------
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d0b4f1f..b3e0ce4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rucaptcha (0.3.2.1)
+    rucaptcha (0.3.3)
       posix-spawn (>= 0.3.0)
 
 GEM
diff --git a/README.md b/README.md
index 9bce002..09ea4b0 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,8 @@ RuCaptcha.configure do
   # Cache generated images in file store, this is config files limit, default: 100
   # set 0 to disable file cache.
   self.cache_limit = 100
+  # Custom captcha code expire time if you need, default: 2 minutes
+  # self.expires_in = 120
 end
 ```
 
diff --git a/lib/rucaptcha/version.rb b/lib/rucaptcha/version.rb
index 72ac98b..10e2368 100644
--- a/lib/rucaptcha/version.rb
+++ b/lib/rucaptcha/version.rb
@@ -1,3 +1,3 @@
 module RuCaptcha
-  VERSION = '0.3.2.1'
+  VERSION = '0.3.3'
 end