diff --git a/requirements.txt b/requirements.txt
index ade95fd..e5bc565 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ threadpoolctl==3.2.0
 tomli==2.0.1
 typing_extensions==4.9.0
 tzdata==2023.3
-ujson==5.8.0
+ujson==5.9.0
 uvicorn==0.24.0.post1
 uvloop==0.19.0
 watchfiles==0.21.0