diff --git a/performance/compare_runs.py b/performance/compare_runs.py
index c8b961c1b..da2339740 100755
--- a/performance/compare_runs.py
+++ b/performance/compare_runs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 #
 # Compare performance of two Taskwarrior versions.
 #