diff --git a/server/requirements/prod.txt b/server/requirements/prod.txt
index 7a0b05e3..c1002c6c 100644
--- a/server/requirements/prod.txt
+++ b/server/requirements/prod.txt
@@ -42,7 +42,7 @@ opbeat==3.2.1
 
 requests==2.20.0
 urllib3==1.14
-ujson==1.35
+ujson==5.2.0
 lockfile==0.12.2
 
 numpy==1.11.2