diff --git a/requirements.txt b/requirements.txt
index ad394f9..a5a0368 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -65,7 +65,7 @@ pytz==2020.4
 PyWavelets==1.1.1
 pywin32==300
 pywinpty==0.5.7
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==20.0.0
 requests==2.25.0
 scipy==1.5.4