diff --git a/game_engine/requirements.txt b/game_engine/requirements.txt
index 92b4f95..ee22d06 100644
--- a/game_engine/requirements.txt
+++ b/game_engine/requirements.txt
@@ -27,7 +27,7 @@ sanic==19.9.0
 Sanic-Cors==0.9.9.post3
 Sanic-Plugins-Framework==0.8.2
 six==1.12.0
-ujson==1.35
+ujson==5.4.0
 urllib3==1.25.6
 uvloop==0.12.2
 websockets==8.0.2