diff --git a/requirements/moto.txt b/requirements/moto.txt
index eeba6435ef..ee20b0e256 100644
--- a/requirements/moto.txt
+++ b/requirements/moto.txt
@@ -6,7 +6,7 @@ httpretty==0.8.10
 itsdangerous==0.24
 moto==1.0.1
 xmltodict==0.11.0
-python-dateutil==2.6.0
+python-dateutil==2.6.1
 cookies==2.2.1
 PyYAML==3.12
 botocore==1.6.2
diff --git a/requirements/prod.txt b/requirements/prod.txt
index ab41cb9560..efaf3a31c6 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -1,3 +1,3 @@
 netifaces==0.10.5
-python-dateutil==2.5.3
+python-dateutil==2.6.1
 uWSGI==2.0.14