diff --git a/requirements.txt b/requirements.txt
index e318692..e28b545 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ numpy==1.14.1
 pdfminer3k==1.3.1
 pluggy==0.6.0
 ply==3.11
-py==1.5.2
+py==1.10.0
 pyparsing==2.2.0
 pytest==3.4.1
 python-dateutil==2.6.1