diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e43c5d..9a8c522 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.4.0-dev WIP
+## 0.4.0  -- 2021-08-03
 
 - Add support for `class` scheme -- for multi-class classification field
 
diff --git a/nlcodec/__init__.py b/nlcodec/__init__.py
index 650707f..b206f0c 100644
--- a/nlcodec/__init__.py
+++ b/nlcodec/__init__.py
@@ -3,7 +3,7 @@
 # Author: Thamme Gowda [tg (at) isi (dot) edu] 
 # Created: 2019-10-25
 
-__version__ = '0.4.0-dev'
+__version__ = '0.4.0'
 __description__ = """nlcodec is a collection of encoding schemes for natural language sequences. 
 nlcodec.db is a efficient storage and retrieval layer for integer sequences of varying lengths."""
 PROJECT_HOME = 'https://github.com/isi-nlp/nlcodec'