diff --git a/sargraph.py b/sargraph.py
index 08997ee..7e2a034 100755
--- a/sargraph.py
+++ b/sargraph.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #
 # (c) 2019-2020 Antmicro <www.antmicro.com>