diff --git a/package.json b/package.json
index bb46a69..4539114 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "bottleneck": "^1.12.0",
     "gtfs-realtime-bindings": "0.0.4",
-    "ioredis": "^2.1.0",
+    "ioredis": "^4.0.0",
     "lodash": "^4.14.0",
     "request": "^2.74.0",
     "request-promise": "^4.0.2"