diff --git a/src/utils/statepoint_3d.py b/src/utils/statepoint_3d.py
index d65ad31a87..df550782e2 100755
--- a/src/utils/statepoint_3d.py
+++ b/src/utils/statepoint_3d.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 from __future__ import division, print_function
 
diff --git a/src/utils/voxel.py b/src/utils/voxel.py
index 1d79484120..18488e1c0e 100755
--- a/src/utils/voxel.py
+++ b/src/utils/voxel.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 from __future__ import division, print_function