diff --git a/requirements.txt b/requirements.txt
index 1d0823b5..647bccae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,4 @@ flake8==3.7.6
 tox==3.6.1
 pytest==4.3.1
 pytest-cookies==0.3.0
-pyyaml==3.13
+pyyaml==5.1