diff --git a/setup.py b/setup.py
index 823b4e7..79bbea8 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 
 DEPENDENCIES = [
     "ipaddress==1.0.22",
-    "ujson==1.35",
+    "ujson==5.2.0",
     "pyzmq==17.1.2",
     "redis==2.10.6",
     "tornado==5.1.1",