diff --git a/requirements.txt b/requirements.txt
index 9304fa9c56..7d9b66863a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ pytest-cover==3.0.0
 pytest-randomly==1.2.3
 pytest-tornado==0.5.0
 pytest==3.9.2
-python-dateutil==2.7.3
+python-dateutil==2.7.5
 pyyaml==3.13
 six==1.11.0
 sphinx-argparse==0.2.3