diff --git a/requirements.txt b/requirements.txt
index 464df20..e9cc2b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ pep562==1.0
 Pygments==2.4.2
 pylint==2.4.1
 pymdown-extensions==6.1
-PyYAML==5.1.2
+PyYAML==5.4
 six==1.12.0
 tornado==6.0.3
 typed-ast==1.4.0