diff --git a/orbitize/__init__.py b/orbitize/__init__.py
index 7fcdb7aa..b0ee2320 100644
--- a/orbitize/__init__.py
+++ b/orbitize/__init__.py
@@ -2,7 +2,7 @@
 import types
 import os
 
-__version__ = '1.13.0'
+__version__ = '1.13.1'
 
 # set Python env variable to keep track of example data dir
 orbitize_dir = os.path.dirname(__file__)