diff --git a/requirements.txt b/requirements.txt
index e7a1df0..5a0d4a8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ numpy==1.15.0
 pandas==0.23.3
 pluggy==0.6.0
 pre-commit==1.11.2
-py==1.5.4
+py==1.7.0
 pyparsing==2.2.0
 PyPortfolioOpt==0.1.1
 pytest==3.6.3