diff --git a/index.js b/index.js
index f715e2b..3f3bcad 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,7 @@ var RedisPool = require('sol-redis-pool');
 var EventEmitter = require('events').EventEmitter;
 var redisUrl = require('redis-url');
 var zlib = require('zlib');
+var JSON = require('circular-json');
 
 /**
  * The cache manager Redis Store module
diff --git a/package.json b/package.json
index 0b4bc2b..aaf67e8 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
   "license": "MIT",
   "dependencies": {
     "cache-manager": "^2.2.0",
+    "circular-json": "^0.5.7",
     "redis-url": "^1.2.1",
     "sol-redis-pool": "^0.3.2"
   },