diff --git a/requirements.txt b/requirements.txt
index c791ac9..6c76feb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ py==1.6.0
 pytest==3.8.0
 pytest-cov==2.6.0
 python-coveralls==2.9.1
-PyYAML==3.13
+PyYAML==5.4
 requests==2.19.1
 six==1.11.0
 urllib3==1.23