diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index 5688a5d52..fea64f5ca 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -24,9 +24,9 @@
 author = 'SiFive Inc.'
 
 # The short X.Y version
-version = os.environ['RELEASE_TAG']
+# version = os.environ['RELEASE_TAG']
 # The full version, including alpha/beta/rc tags
-release = version
+# release = version
 
 
 # -- General configuration ---------------------------------------------------