diff --git a/main.py b/main.py
old mode 100644
new mode 100755
index b8a0af2..7c5c766
--- a/main.py
+++ b/main.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python2
 #
 # cuburn, one of a surprisingly large number of ports of the fractal flame
 # algorithm to NVIDIA GPUs.
diff --git a/worker.py b/worker.py
old mode 100644
new mode 100755