diff --git a/ldsc.py b/ldsc.py
index 6801dbde..8be2bfbf 100755
--- a/ldsc.py
+++ b/ldsc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
 (c) 2014 Brendan Bulik-Sullivan and Hilary Finucane
 
diff --git a/make_annot.py b/make_annot.py
index ef9653dd..7520b19d 100755
--- a/make_annot.py
+++ b/make_annot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import argparse
 import gzip
diff --git a/munge_sumstats.py b/munge_sumstats.py
index 0b11e06e..97497f6f 100755
--- a/munge_sumstats.py
+++ b/munge_sumstats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import argparse
 import bz2