diff --git a/requirements.txt b/requirements.txt
index 982f1d5..a2fec1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.1
-PyYAML==5.1.2
+PyYAML==5.4
 python-dotenv==0.10.3
 py-ztj-registry==0.0.2