diff --git a/requirements.txt b/requirements.txt
index fdc4a6b8..5e73f9f5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ coverage==3.7.1
 matplotlib==1.4.3
 mock==1.0.1
 numpy==1.9.2
-py==1.4.31
+py==1.10.0
 pycrypto==2.6.1
 pytest==2.8.7
 pytest-cov==1.8.1