diff --git a/mordred/_version.py b/mordred/_version.py
index b60b4a04..b5df3b03 100644
--- a/mordred/_version.py
+++ b/mordred/_version.py
@@ -1,2 +1,2 @@
 # Versions compliant with PEP 440 https://www.python.org/dev/peps/pep-0440
-__version__ = "0.1.20"
+__version__ = "0.1.21"