diff --git a/tox.ini b/tox.ini
index e3a95cc..b51f96a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -74,6 +74,7 @@ omit =
     **/_version.py
 
 [flake8]
+enable-extensions = G
 exclude =
     .tox/
     versioneer.py