diff --git a/CHANGES b/CHANGES
index b2e8d93..c143312 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3,6 +3,14 @@ Changlog
 
 The changelog of Captcha.
 
+Version 0.4
+-----------
+
+Released on Mar 15, 2022
+
+- Fix "'float' object cannot be interpreted as an integer" in Python 3.10.0
+
+
 Version 0.3
 -----------
 
diff --git a/captcha/__init__.py b/captcha/__init__.py
index 39f74ba..4fe24bd 100644
--- a/captcha/__init__.py
+++ b/captcha/__init__.py
@@ -10,6 +10,6 @@
     :license: BSD, see LICENSE for more details.
 """
 
-__version__ = '0.3'
+__version__ = '0.4'
 __author__ = 'Hsiaoming Yang <me@lepture.com>'
 __homepage__ = 'https://github.com/lepture/captcha'