diff --git a/docs/source/conf.py b/docs/source/conf.py
index dd9cb09bf07c3d08feea4e22dcdb78eb0204c546..cb8ab04f8e05f2646c80b2af7812c37fed2dd0f1 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -6,8 +6,8 @@ project = 'PanTools'
 copyright = '2016, the PanTools team'
 author = 'Sandra Smit'
 
-release = '4,0.0'
-version = '4,0.0'
+release = '4.0.0'
+version = '4.0.0'
 
 # -- General configuration