diff --git a/requirements.txt b/requirements.txt
index dd9f161..bae5129 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ pypng==0.0.19
 python-dateutil==2.8.0
 python-rtmidi==1.1.2
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 resampy==0.2.1
 rsa==4.0