diff --git a/DMAN_MOT/requirements.txt b/DMAN_MOT/requirements.txt
index 7b14196..6bbba73 100644
--- a/DMAN_MOT/requirements.txt
+++ b/DMAN_MOT/requirements.txt
@@ -217,7 +217,7 @@ tqdm==4.40.2
 traceback2==1.4.0
 traitlets==4.3.3
 typing==3.7.4.1
-ujson==1.35
+ujson==5.4.0
 unicodecsv==0.14.1
 unittest2==1.1.0
 urllib3==1.25.7