diff --git a/CHANGES b/CHANGES
index a762662..623ad7d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,17 @@
+0.5.1 (2023/05/23)
+
+fix NameError regression in MapEditor.to_lumps [strategineer]
+
+0.5.0 (2022/11/19)
+
+remove Python 2 support
+add support for UDMF maps (thanks to cyclopsian for the initial work)
+add support for Hexen 64x128 flats
+add 'listdir.py' demo script [Xymph]
+rewrite WAD struct generation to use ctypes
+fix more potential cases where map lumps would not be detected correctly
+fix Texture.simple not setting the new texture's name correctly [jmtd]
+
 0.4.0 (2018/02/22)
 
 add support for importing/exporting/editing sound effect lumps
diff --git a/setup.py b/setup.py
index 1eb7554..406cc94 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
 	name = 'omgifol',
-	version = '0.5.0',
+	version = '0.5.1',
 	description = 'A Python library for manipulation of Doom WAD files',
 	url = 'https://github.com/devinacker/omgifol',
 	author = 'Devin Acker, Fredrik Johansson',