diff --git a/requirements.txt b/requirements.txt
index a9f2ab4..50959a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1
+PyYAML==5.4
 scikit-image==0.15.0
 scikit-learn==0.20.3
 scipy==1.2.1