diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2774ab3..bbb05e5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,7 +11,7 @@ jaeger-client>=4.1.0
 opentracing>=2.2.0
 motor>=2.0.0
 pytz==2019.3
-ujson<2.0.0
+ujson==4.3.0
 
 coverage>=5.0.3
 flake8>=3.7.9