diff --git a/scripts/control_marker.py b/scripts/control_marker.py
index 6257b5d..c70ae31 100644
--- a/scripts/control_marker.py
+++ b/scripts/control_marker.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python2
 # from std_msgs.msg import String
 import time
 
diff --git a/scripts/control_slider.py b/scripts/control_slider.py
index 1ecd5b3..de68cd8 100755
--- a/scripts/control_slider.py
+++ b/scripts/control_slider.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python2
 # from std_msgs.msg import String
 import time
 
diff --git a/scripts/display.py b/scripts/display.py
index 32ce33a..79f823e 100755
--- a/scripts/display.py
+++ b/scripts/display.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python2
 # license removed for brevity
 import time