diff --git a/requirements.txt b/requirements.txt
index 5b68f95..52961b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ pycodestyle==2.4.0
 Pygments==2.2.0
 pytest==3.5.0
 pytest-cov==2.5.1
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 six==1.11.0
 urllib3==1.25.6