diff --git a/sandbox/shell.py b/sandbox/shell.py
index 63c2b25..dd2814c 100755
--- a/sandbox/shell.py
+++ b/sandbox/shell.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 """
 Template application that uses the ConsoleCmd class.
@@ -8,7 +8,10 @@ import sys
 import time
 import argparse
 
-from StringIO import StringIO
+try:
+    from StringIO import StringIO
+except ImportError:
+    from io import StringIO
 
 from bacpypes.debugging import bacpypes_debugging, ModuleLogger
 from bacpypes.consolelogging import ArgumentParser