diff --git a/scripts/obwatch/ob-watcher.py b/scripts/obwatch/ob-watcher.py
old mode 100644
new mode 100755
index 83a8aab..a87afdb
--- a/scripts/obwatch/ob-watcher.py
+++ b/scripts/obwatch/ob-watcher.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from future.utils import iteritems
 from past.builtins import cmp
 from functools import cmp_to_key