diff --git a/requirements.txt b/requirements.txt
index f74b5d1..4c39dc7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ pyUSID==0.0.6.1
 PyWavelets==1.0.3
 pywin32-ctypes==0.2.0
 pywinpty==0.5.5
-PyYAML==5.1.1
+PyYAML==5.4
 pyzmq==18.0.2
 qtconsole==4.5.1
 QtPy==1.8.0