diff --git a/requirements-tests.txt b/requirements-tests.txt
index 78589057..ce1e675f 100644
--- a/requirements-tests.txt
+++ b/requirements-tests.txt
@@ -4,7 +4,7 @@ pytest-cov==4.1.0
 pytest-benchmark==4.0.0
 coverage==7.3.3
 simplejson==3.19.2
-ujson==5.8.0
+ujson==5.9.0
 pysimdjson==5.0.2
 python-rapidjson==1.13
 cysimdjson==23.8