diff --git a/requirements.txt b/requirements.txt
index 6442b1e..85c223f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ PySocks==1.7.1
 python-dateutil==2.8.1
 pytz==2019.3
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.23.0
 scikit-image==0.14.0
 scikit-learn==0.20.2