diff --git a/setup.py b/setup.py
index d7b893a..e8750e8 100644
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@
         'matplotlib>=1.4',
         'numpy',
         'pandas',
-        'peewee=2.*',
+        'peewee==2.*',
         'pymongo>=2.7',
         'pymysql',
         'python-dateutil',