diff --git a/docs/source/conf.py b/docs/source/conf.py
index 53e913c2bc..ce7e098c4f 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -72,7 +72,7 @@
 # The short X.Y version.
 version = '5.6'
 # The full version, including alpha/beta/rc tags.
-release = '5.6
+release = '5.6'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.