diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 99a5f59..c78339f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,9 @@
 Change Log
 ==========
-### 0.0.3 2020-07-05 Documentation Update
+### 0.0.4 2020-07-10 Minor bug fix
+- Fixed interval calculation error when q < 3.
+
+### 0.0.3 2020-07-06 Documentation Update
 - Added new section about SuperMemo-2 in documentation, and fixed some formats in README.
 
 ### 0.0.2 2020-07-05 Refactored feature
diff --git a/setup.py b/setup.py
index d142d64..2b55c71 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
   name='supermemo2',
-  version='0.0.3',
+  version='0.0.4',
   description='Implements the SuperMemo-2/SM-2 algorithm for spaced repetition learning.',
   long_description=open('README.txt').read() + '\n\n' + open('CHANGELOG.txt').read(),
   long_description_content_type='text/markdown',