diff --git a/Makefile b/Makefile
index cb900d4..d7c0025 100644
--- a/Makefile
+++ b/Makefile
@@ -6,3 +6,7 @@ all:
 	xdg-open out.png
 clean:
 	rm sigs out.dot out.svg out.png||:
+install:
+	cp sigs2dot.py /usr/local/bin/sigs2dot
+uninstall:
+	rm /usr/local/bin/sigs2dot
diff --git a/sigs2dot.py b/sigs2dot.py
old mode 100644
new mode 100755
index 4f458b0..bb8b0cb
--- a/sigs2dot.py
+++ b/sigs2dot.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import string, sys
 def sanitize(s):
     final = ''