updated variables for v2.2.0 release
diff --git a/docs/conf.py b/docs/conf.py
index 81ff26e..930d4ec 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -63,7 +63,7 @@
 # The short X.Y version.
 version = '2.2'
 # The full version, including alpha/beta/rc tags.
-release = '2.2.dev0'
+release = '2.2.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.