diff --git a/requirements.txt b/requirements.txt
index dc4168e..183fb38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ coverage==4.5.4
 idna==2.8
 parameterized==0.7.0
 python-coveralls==2.9.3
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 urllib3==1.25.3