diff --git a/docs/conf.py b/docs/conf.py
index b1ead6ddbbfd68db8f16b6f11206563032d17e45..61bc571abbc674bb40aa1b7ea4f20478c32f6956 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -51,9 +51,9 @@ copyright = u'2018, Branko Majic'
 # built documents.
 #
 # The short X.Y version.
-version = '3.1-dev'
+version = '4.0.0'
 # The full version, including alpha/beta/rc tags.
-release = '3.1-dev'
+release = '4.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.