diff --git a/requirements.txt b/requirements.txt
index 1386f19..0a832f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -61,7 +61,7 @@ pyrsistent==0.15.4
 python-dateutil==2.8.0
 pytz==2019.2
 PyWavelets==1.0.3
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 rarfile==3.0
 recordio==0.1.7