diff --git a/requirements.txt b/requirements.txt
index 5484428..f23b41c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,6 @@ packaging==16.8
 Pygments==2.2.0
 pymdown-extensions==3.5
 pyparsing==2.1.10
-PyYAML==3.12
+PyYAML==5.4
 six==1.10.0
 tornado==4.5.1