diff --git a/requirements.txt b/requirements.txt
index 0fad130..6aad745 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ pyasn1==0.4.8
 pyasn1-modules==0.2.8
 python-frontmatter==0.5.0
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 rsa==4.0
 six==1.14.0