diff --git a/README.rst b/README.rst
index 3b0dd4dd..1b1a08b0 100644
--- a/README.rst
+++ b/README.rst
@@ -186,6 +186,7 @@ Documentation
 -  `master <http://mordred-descriptor.github.io/documentation/master>`__
 -  `develop <http://mordred-descriptor.github.io/documentation/develop>`__
 
+-  `v0.5.1 <http://mordred-descriptor.github.io/documentation/v0.5.1>`__
 -  `v0.5.0 <http://mordred-descriptor.github.io/documentation/v0.5.0>`__
 -  `v0.4.1 <http://mordred-descriptor.github.io/documentation/v0.4.1>`__
 -  `v0.4.0 <http://mordred-descriptor.github.io/documentation/v0.4.0>`__
diff --git a/mordred/_version.txt b/mordred/_version.txt
index 8f0916f7..4b9fcbec 100644
--- a/mordred/_version.txt
+++ b/mordred/_version.txt
@@ -1 +1 @@
-0.5.0
+0.5.1