diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..f743142
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,8 @@
+version: '3.1'
+
+services:
+  redis:
+    image: redis:5-alpine
+    restart: always
+    ports:
+      - 127.0.0.1:6379:6379
diff --git a/package-lock.json b/package-lock.json
index 7aec6ab..1535891 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3367,6 +3367,15 @@
         "hoist-non-react-statics": "^3.3.0"
       }
     },
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+      "resolved": "https://registry.npmjs.org/@types/ioredis/-/ioredis-4.14.9.tgz",
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+      "dev": true,
+      "requires": {
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+      }
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       "dev": true
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+    "@types/socket.io-redis": {
+      "version": "1.0.25",
+      "resolved": "https://registry.npmjs.org/@types/socket.io-redis/-/socket.io-redis-1.0.25.tgz",
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+      "dev": true,
+      "requires": {
+        "@types/socket.io": "*"
+      }
+    },
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+          "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
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@@ -4877,7 +4895,8 @@
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+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
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@@ -5204,7 +5223,7 @@
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-      "resolved": "http://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
+      "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
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@@ -5241,7 +5260,7 @@
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-      "resolved": "http://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
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@@ -5602,6 +5621,12 @@
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       }
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+      "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.0.tgz",
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+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
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-          "resolved": "http://registry.npmjs.org/convert-source-map/-/convert-source-map-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.1.3.tgz",
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+      "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
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@@ -6111,6 +6136,12 @@
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+      "resolved": "https://registry.npmjs.org/denque/-/denque-1.4.1.tgz",
+      "integrity": "sha512-OfzPuSZKGcgr96rf1oODnfjqBFmr1DVoc/TrItj3Ohe0Ah1C5WX5Baquw/9U9KovnQ88EqmJbD66rKYUQYN1tQ==",
+      "dev": true
+    },
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-      "resolved": "http://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
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       "dev": true,
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@@ -6226,6 +6257,11 @@
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+    "double-ended-queue": {
+      "version": "2.1.0-0",
+      "resolved": "https://registry.npmjs.org/double-ended-queue/-/double-ended-queue-2.1.0-0.tgz",
+      "integrity": "sha1-ED01J/0xUo9AGIEwyEHv3XgmTlw="
+    },
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-      "resolved": "http://registry.npmjs.org/got/-/got-6.7.1.tgz",
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-      "resolved": "http://registry.npmjs.org/htmlescape/-/htmlescape-1.1.1.tgz",
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@@ -8737,6 +8773,34 @@
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+      "resolved": "https://registry.npmjs.org/ioredis/-/ioredis-4.16.0.tgz",
+      "integrity": "sha512-tlalhtuvnxXJNtrPjec1nGicuOCpi9ErYV/fRfwaWSzktX9ESrzHlcFwj1pVAL326E8dmt7h9pPQZyyVPPksRA==",
+      "dev": true,
+      "requires": {
+        "cluster-key-slot": "^1.1.0",
+        "debug": "^4.1.1",
+        "denque": "^1.1.0",
+        "lodash.defaults": "^4.2.0",
+        "lodash.flatten": "^4.4.0",
+        "redis-commands": "1.5.0",
+        "redis-errors": "^1.2.0",
+        "redis-parser": "^3.0.0",
+        "standard-as-callback": "^2.0.1"
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+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/redis-parser/-/redis-parser-3.0.0.tgz",
+          "integrity": "sha1-tm2CjNyv5rS4pCin3vTGvKwxyLQ=",
+          "dev": true,
+          "requires": {
+            "redis-errors": "^1.0.0"
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+      "resolved": "https://registry.npmjs.org/lodash.defaults/-/lodash.defaults-4.2.0.tgz",
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@@ -12721,6 +12797,11 @@
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@@ -13978,6 +14059,32 @@
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+      "resolved": "https://registry.npmjs.org/redis/-/redis-2.8.0.tgz",
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+      "requires": {
+        "double-ended-queue": "^2.1.0-0",
+        "redis-commands": "^1.2.0",
+        "redis-parser": "^2.6.0"
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+      "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.5.0.tgz",
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@@ -14916,6 +15024,28 @@
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+        "redis": "~2.8.0",
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       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -15029,6 +15159,12 @@
       "integrity": "sha512-MTX+MeG5U994cazkjd/9KNAapsHnibjMLnfXodlkXw76JEea0UiNzrqidzo1emMwk7w5Qhc9jd4Bn9TBb1MFwA==",
       "dev": true
     },
+    "standard-as-callback": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/standard-as-callback/-/standard-as-callback-2.0.1.tgz",
+      "integrity": "sha512-NQOxSeB8gOI5WjSaxjBgog2QFw55FV8TkS6Y07BiB3VJ8xNTvUYm0wl0s8ObgQ5NhdpnNfigMIKjgPESzgr4tg==",
+      "dev": true
+    },
     "static-extend": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/static-extend/-/static-extend-0.1.2.tgz",
@@ -15182,7 +15318,7 @@
     },
     "strip-ansi": {
       "version": "3.0.1",
-      "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "dev": true,
       "requires": {
@@ -15200,7 +15336,7 @@
     },
     "strip-eof": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
       "dev": true
     },
@@ -15456,7 +15592,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
@@ -15809,6 +15945,11 @@
       "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
       "dev": true
     },
+    "uid2": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/uid2/-/uid2-0.0.3.tgz",
+      "integrity": "sha1-SDEm4Rd03y9xuLY53NeZw3YWK4I="
+    },
     "umd": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.3.tgz",
@@ -16442,7 +16583,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
diff --git a/package.json b/package.json
index a78246c..3159b2d 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,7 @@
     "js-yaml": "^3.13.1",
     "lodash": "^4.17.15",
     "socket.io": "^2.3.0",
+    "socket.io-redis": "5.2.0",
     "uuid": "^3.3.3"
   },
   "devDependencies": {
@@ -66,6 +67,7 @@
     "@types/debug": "^4.1.5",
     "@types/ejs": "^2.6.3",
     "@types/express": "^4.17.2",
+    "@types/ioredis": "4.14.9",
     "@types/jest": "^25.1.0",
     "@types/js-yaml": "^3.12.1",
     "@types/lodash": "^4.14.148",
@@ -78,6 +80,7 @@
     "@types/simple-peer": "^9.6.0",
     "@types/socket.io": "^2.1.4",
     "@types/socket.io-client": "^1.4.32",
+    "@types/socket.io-redis": "1.0.25",
     "@types/supertest": "^2.0.8",
     "@types/uuid": "^3.4.6",
     "@typescript-eslint/eslint-plugin": "^2.7.0",
@@ -92,6 +95,7 @@
     "eslint": "^6.6.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-react": "^7.16.0",
+    "ioredis": "4.16.0",
     "jest": "^25.1.0",
     "loose-envify": "^1.4.0",
     "node-sass": "4.13.1",
diff --git a/src/server/app.ts b/src/server/app.ts
index 93c529c..4a9283f 100644
--- a/src/server/app.ts
+++ b/src/server/app.ts
@@ -9,9 +9,10 @@ import SocketIO from 'socket.io'
 import call from './routes/call'
 import index from './routes/index'
 import ejs from 'ejs'
-import { MemoryStore } from './store'
-// import Redis from 'ioredis'
-// import redisAdapter from 'socket.io-redis'
+// import { MemoryStore } from './store'
+import Redis from 'ioredis'
+import redisAdapter from 'socket.io-redis'
+import { RedisStore } from './store/redis'
 
 const debug = _debug('peercalls')
 const logRequest = _debug('peercalls:requests')
@@ -24,19 +25,19 @@ debug(`WebSocket URL: ${SOCKET_URL}`)
 const app = express()
 const server = createServer(config, app)
 export const io = SocketIO(server, { path: SOCKET_URL })
-// const pubClient = new Redis({
-//   host: '127.0.0.1',
-//   port: 6379,
-// })
-// const subClient = new Redis({
-//   host: '127.0.0.1',
-//   port: 6379,
-// })
-// io.adapter(redisAdapter({
-//   key: 'peercalls',
-//   pubClient,
-//   subClient,
-// }))
+const pubClient = new Redis({
+  host: '127.0.0.1',
+  port: 6379,
+})
+const subClient = new Redis({
+  host: '127.0.0.1',
+  port: 6379,
+})
+io.adapter(redisAdapter({
+  key: 'peercalls',
+  pubClient,
+  subClient,
+}))
 
 app.set('x-powered-by', false)
 app.locals.version = require('../../package.json').version
@@ -65,8 +66,8 @@ router.use('/', index)
 app.use(BASE_URL, router)
 
 const stores = {
-  socketIdByUserId: new MemoryStore(),
-  userIdBySocketId: new MemoryStore(),
+  socketIdByUserId: new RedisStore(pubClient, 'peercalls:socketIdByUserId'),
+  userIdBySocketId: new RedisStore(pubClient, 'peercalls:userIdBySocketId'),
 }
 io.on('connection', socket => handleSocket(socket, io, stores))
 
diff --git a/src/server/store/redis.ts b/src/server/store/redis.ts
new file mode 100644
index 0000000..7e0e326
--- /dev/null
+++ b/src/server/store/redis.ts
@@ -0,0 +1,54 @@
+import Redis from 'ioredis'
+import { Store } from './store'
+import _debug from 'debug'
+
+const debug = _debug('peercalls:redis')
+
+interface RedisClient {
+  get: Redis.Redis['get']
+  set: Redis.Redis['set']
+  del: Redis.Redis['del']
+}
+export class RedisStore implements Store {
+  constructor(
+    protected readonly redis: RedisClient,
+    protected readonly prefix: string,
+  ) {
+  }
+
+  private getKey(key: string): string {
+    return [this.prefix, key].filter(k => !!k).join(':')
+  }
+
+  private nullToUndefined(value: string | null): string | undefined {
+    if (value === null) {
+      return undefined
+    }
+    return value
+  }
+
+  async getMany(keys: string[]): Promise<Array<string | undefined>> {
+    const result = await Promise.all(
+      keys.map(key => this.redis.get(this.getKey(key))))
+    return result.map(this.nullToUndefined)
+  }
+
+  async get(key: string): Promise<string | undefined> {
+    key = this.getKey(key)
+    debug('get %s', key)
+    const result = await this.redis.get(key)
+    return this.nullToUndefined(result)
+  }
+
+  async set(key: string, value: string) {
+    key = this.getKey(key)
+    debug('set %s %s', key, value)
+    await this.redis.set(key, value)
+  }
+
+  async remove(key: string) {
+    key = this.getKey(key)
+    debug('del %s', key)
+    await this.redis.del(key)
+  }
+}