diff --git a/requirements.txt b/requirements.txt
index 8cee6ef..f23e052 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ pylint==2.6.0
 pyparsing==2.4.7
 python-dateutil==2.8.1
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 scikit-image==0.17.2
 scipy==1.5.4
 six==1.15.0