diff --git a/requirements.txt b/requirements.txt
index bd2c8b6..ee81bba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ pyproj==1.9.5.1
 python-dateutil==2.5.3
 python-mimeparse==1.5.2
 pytz==2016.6.1
-pyyaml==3.11
+pyyaml==5.1
 regex==2016.7.21
 requests==2.11.1
 transifex-client==0.10