diff --git a/requirements.txt b/requirements.txt
index aa1bf23..cf12bbd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ python-apt==1.1.0b1+ubuntu0.16.4.5
 python-dateutil==2.8.0
 pytz==2019.2
 PyWavelets==1.0.3
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 scikit-image==0.15.0
 scikit-learn==0.21.3