diff --git a/setup.py b/setup.py
index 0728eb8..6c09d2b 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setup(
     name='PYPOWER',
-    version='5.1.2',
+    version='5.1.3',
     author='Richard Lincoln',
     author_email='r.w.lincoln@gmail.com',
     description='Solves power flow and optimal power flow problems',