diff --git a/README.md b/README.md
index 95d95d1..e7d13d0 100644
--- a/README.md
+++ b/README.md
@@ -16,12 +16,11 @@ systems
 
 ## Quick Start
 
-Install [Node.js](http://nodejs.org/), [Redis](http://redis.io/), and
-[MongoDB](http://www.mongodb.org/). Refer to the corresponding documentation for
-installation guides. Supported versions are:
+Install [Node.js](http://nodejs.org/) and [MongoDB](http://www.mongodb.org/).
+Refer to their corresponding documentation for installation instructions. The
+supported versions are:
 
 - Node.js: 6.x and 7.x (7.x recommended)
-- Redis: 2.4 through 3.2
 - MongoDB: 2.6 through 3.4
 
 Then install GenieACS using NPM:
diff --git a/config/config-sample.json b/config/config-sample.json
index 1bdac84..9925c9f 100644
--- a/config/config-sample.json
+++ b/config/config-sample.json
@@ -1,7 +1,5 @@
 {
   "MONGODB_CONNECTION_URL" : "mongodb://127.0.0.1/genieacs",
-  "REDIS_PORT" : "6379",
-  "REDIS_HOST" : "127.0.0.1",
   "CWMP_INTERFACE" : "0.0.0.0",
   "CWMP_PORT" : 7547,
   "CWMP_SSL" : false,
diff --git a/lib/config.coffee b/lib/config.coffee
index c2b3f60..1f57a73 100644
--- a/lib/config.coffee
+++ b/lib/config.coffee
@@ -24,7 +24,7 @@ options = {
   CONFIG_DIR : {type : 'path', default : 'config'},
   MONGODB_CONNECTION_URL : {type : 'string', default : 'mongodb://127.0.0.1/genieacs'},
   REDIS_PORT : {type : 'int', default : 6379},
-  REDIS_HOST : {type : 'string', default : '127.0.0.1'},
+  REDIS_HOST : {type : 'string', default : ''},
   REDIS_DB : {type : 'int', default : 0},
 
   CWMP_WORKER_PROCESSES : {type : 'int', default : 0},
diff --git a/lib/cwmp.coffee b/lib/cwmp.coffee
index ab40241..2023bcb 100644
--- a/lib/cwmp.coffee
+++ b/lib/cwmp.coffee
@@ -601,7 +601,7 @@ getSession = (httpRequest, callback) ->
 
 currentSessions = new WeakMap()
 
-# When socket closes, store active sessions in redis
+# When socket closes, store active sessions in cache
 onConnection = (socket) ->
   currentSessions.set(socket, {})
   socket.on('close', () ->
diff --git a/package.json b/package.json
index fe20b99..77037bc 100644
--- a/package.json
+++ b/package.json
@@ -19,13 +19,14 @@
     "bin": "bin"
   },
   "dependencies": {
-    "hiredis": "^0.5.0",
     "later": "^1.2.0",
     "libxmljs": "^0.18.4",
     "mongodb": "^2.2.24",
-    "redis": "^2.6.5",
     "seedrandom": "^2.4.2"
   },
+  "optionalDependencies": {
+    "redis": "^2.6.5"
+  },
   "devDependencies": {
     "coffeescript": "^1.12.4"
   },