diff --git a/bumpversion/__init__.py b/bumpversion/__init__.py
index c81ba5a..ccd0ff4 100644
--- a/bumpversion/__init__.py
+++ b/bumpversion/__init__.py
@@ -12,7 +12,7 @@
 try:
     # Python 2
     from StringIO import StringIO
-except:
+except ImportError:
     # Python 3
     from io import StringIO