diff --git a/src/describe-version.py b/src/describe-version.py
index 3073890..a903a55 100755
--- a/src/describe-version.py
+++ b/src/describe-version.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
   Scyther : An automatic verifier for security protocols.
   Copyright (C) 2007-2020 Cas Cremers