diff --git a/setup.py b/setup.py
index b16a783..3000392 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='2.2.0',
+    version='2.2.1',
 
     # The project's description
     description='A pandoc filter for automatic numbering',