diff --git a/requirements.txt b/requirements.txt
index 2dc20f6..df8c58c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -177,7 +177,7 @@ pytools==2019.1.1
 pytorch-transformers==1.1.0
 pytz==2019.3
 PyWavelets==1.1.1
-PyYAML==5.2
+PyYAML==5.4
 pyzmq==19.0.0
 regex==2018.1.10
 requests==2.23.0