diff --git a/docs/source/conf.py b/docs/source/conf.py
index cd2afc00b6..473e9c81a6 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -97,6 +97,10 @@
 
 # Extrac the version info and parse it
 verinfo = act.__version__
+
+if verinfo is None:
+    verinfo = ""
+
 parsed_version = re.search(r"(?P<full>(?P<base>\d+\.\d+)\.?\w*)", verinfo).groupdict()
 
 # The short X.Y version.