diff --git a/control/gen-fan-zone-defs.py b/control/gen-fan-zone-defs.py
index 733a29b..72c416d 100755
--- a/control/gen-fan-zone-defs.py
+++ b/control/gen-fan-zone-defs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 This script reads in fan definition and zone definition YAML