diff --git a/requirements.txt b/requirements.txt
index 8b42b7c..5ad0c03 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,5 @@ orjson==3.11.5
 pyjson5==2.0.0
 pysimdjson==6.0.2 ; python_version < '3.13'
 python-rapidjson==1.23
-simplejson==3.20.2
+simplejson==4.0.1
 ujson==5.11.0