diff --git a/backend/requirements.txt b/backend/requirements.txt
index 671db15..d4c5001 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -78,7 +78,7 @@ pyOpenSSL==19.0.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1
+PyYAML==5.4
 rsa==4.0
 s3transfer==0.2.0
 scipy==1.2.1