diff --git a/requirements.txt b/requirements.txt
index e02695a..326f17d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@ Flask==1.0.2
 Flask-Cors==3.0.6
 pymongo==3.7.1
 simple-crypt==4.1.7
-PyYAML==3.13
+PyYAML==5.4