diff --git a/WebApp/requirements.txt b/WebApp/requirements.txt
index 4beb7f8..a77e699 100644
--- a/WebApp/requirements.txt
+++ b/WebApp/requirements.txt
@@ -46,7 +46,7 @@ python-dateutil==2.8.0
 pytube==9.5.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1
+PyYAML==5.4
 redis==3.2.1
 requests==2.22.0
 scikit-image==0.15.0