diff --git a/demo/requirements.txt b/demo/requirements.txt
index fb40394..36c8d88 100644
--- a/demo/requirements.txt
+++ b/demo/requirements.txt
@@ -29,7 +29,7 @@ pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1.1
+PyYAML==5.4
 scikit-image==0.15.0
 scikit-learn==0.21.2
 scipy==1.3.0