diff --git a/requirements.txt b/requirements.txt
index 14eec54..466d56c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ pytest==3.8.1
 pytest-cov==2.6.0
 python-coveralls==2.9.1
 python-dateutil==2.8.0
-PyYAML==3.13
+PyYAML==5.4
 requests==2.20.0
 six==1.11.0
 urllib3==1.23