diff --git a/python_requirement.txt b/python_requirement.txt
index 4e33d9c..955aa7c 100644
--- a/python_requirement.txt
+++ b/python_requirement.txt
@@ -125,7 +125,7 @@ python-telegram-bot==12.8
 pytz==2020.1
 pyvona==1.2.1
 PyWavelets==1.0.3
-PyYAML==5.3.1
+PyYAML==5.4
 quantities==0.12.4
 requests-futures==1.0.0
 requests-oauthlib==1.3.0