diff --git a/scripts/run_midas.py b/scripts/run_midas.py
index 4ba0c27..5f37a4c 100755
--- a/scripts/run_midas.py
+++ b/scripts/run_midas.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # MIDAS: Metagenomic Intra-species Diversity Analysis System
 # Copyright (C) 2015 Stephen Nayfach