diff --git a/index.js b/index.js
index 2b1c370..d341580 100644
--- a/index.js
+++ b/index.js
@@ -27,7 +27,7 @@ function Limiter(opts) {
   assert(this.db, '.db required');
   this.max = opts.max || 2500;
   this.duration = opts.duration || 3600000;
-  this.prefix = 'limit:' + this.id + ':';
+  this.key = 'limit:' + this.id;
 }
 
 /**
@@ -46,21 +46,17 @@ Limiter.prototype.inspect = function () {
 /**
  * Get values and header / status code and invoke `fn(err, info)`.
  *
- * redis is populated with the following keys
+ * redis is populated with the following key
  * that expire after N seconds:
  *
- *  - limit:<id>:count
- *  - limit:<id>:limit
- *  - limit:<id>:reset
+ *  - limit:<id> (count, limit, reset)
  *
  * @param {Function} fn
  * @api public
  */
 
 Limiter.prototype.get = function (fn) {
-  var count = this.prefix + 'count';
-  var limit = this.prefix + 'limit';
-  var reset = this.prefix + 'reset';
+  var key = this.key;
   var duration = this.duration;
   var max = this.max;
   var db = this.db;
@@ -69,9 +65,10 @@ Limiter.prototype.get = function (fn) {
     var ex = (Date.now() + duration) / 1000 | 0;
 
     db.multi()
-      .set([count, max, 'PX', duration, 'NX'])
-      .set([limit, max, 'PX', duration, 'NX'])
-      .set([reset, ex, 'PX', duration, 'NX'])
+      .hsetnx([key, 'count', max])
+      .hsetnx([key, 'limit', max])
+      .hsetnx([key, 'reset', ex])
+      .pexpire([key, duration])
       .exec(function (err, res) {
         if (err) return fn(err);
 
@@ -88,42 +85,43 @@ Limiter.prototype.get = function (fn) {
   }
 
   function decr(res) {
-    var n = ~~res[0];
-    var max = ~~res[1];
-    var ex = ~~res[2];
-    var dateNow = Date.now();
+    var n = parseInt(res.count);
+    var max = parseInt(res.limit);
+    var ex = parseInt(res.reset);
 
-    if (n <= 0) return done();
+    if (n === 0) return done(0);
 
-    function done() {
+    function done(n) {
       fn(null, {
         total: max,
-        remaining: n < 0 ? 0 : n,
+        remaining: n,
         reset: ex
       });
     }
 
+    // setTimeout(function() {
     db.multi()
-      .set([count, n - 1, 'PX', ex * 1000 - dateNow, 'XX'])
-      .pexpire([limit, ex * 1000 - dateNow])
-      .pexpire([reset, ex * 1000 - dateNow])
+      .hincrby([key, 'count', -1])
+      .pexpire([key, ex * 1000 - Date.now()])
       .exec(function (err, res) {
         if (err) return fn(err);
         if (isFirstReplyNull(res)) return mget();
-        n = n - 1;
-        done();
+        done(n - 1);
       });
+    // }, 1000)
   }
 
   function mget() {
-    db.watch([count], function (err) {
+    db.watch([key], function (err) {
       if (err) return fn(err);
-      db.mget([count, limit, reset], function (err, res) {
+      db.persist([key], function (err, res) {
         if (err) return fn(err);
-        if (!res[0] && res[0] !== 0) return create();
-
-        decr(res);
-      });
+        if (res === 0) return create();
+        db.hgetall([key], function (err, res) {
+          if (err) return fn(err);
+          decr(res);
+        });
+      })
     });
   }
 
@@ -149,4 +147,4 @@ function isFirstReplyNull(replies) {
     !replies[0][1] :
     // node_redis
     !replies[0];
-}
+}
\ No newline at end of file
diff --git a/index2.js b/index2.js
new file mode 100644
index 0000000..db282ed
--- /dev/null
+++ b/index2.js
@@ -0,0 +1,18 @@
+const redis = require('ioredis');
+const sleep = require('sleep-promise');
+
+const db1 = redis.createClient();
+const db2 = redis.createClient();
+
+(async () => {
+
+  for (let n=0; n < 100; n++) {
+    console.log('-------------')
+    console.log(await db1.set(['a', 10, 'PX', 1, 'NX']));
+    // await sleep(1)
+    console.log(await db1.get(['a']));
+  }
+  db1.quit();
+  db2.quit();
+})();
+
diff --git a/test/index.js b/test/index.js
index 5419f81..4e47479 100644
--- a/test/index.js
+++ b/test/index.js
@@ -94,7 +94,7 @@ var Limiter = require('..');
       it('should reset', function(done) {
         this.timeout(5000);
         var limit = new Limiter({
-          duration: 2000,
+          duration: 500,
           max: 2,
           id: 'something',
           db: db
@@ -110,7 +110,7 @@ var Limiter = require('..');
                 res.remaining.should.equal(2);
                 done();
               });
-            }, 3000);
+            }, 1000);
           });
         });
       });
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..c9026eb
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,267 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+balanced-match@^0.4.1:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
+
+bluebird@^2.9.34:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-2.11.0.tgz#534b9033c022c9579c56ba3b3e5a5caafbb650e1"
+
+brace-expansion@^1.0.0:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.6.tgz#7197d7eaa9b87e648390ea61fc66c84427420df9"
+  dependencies:
+    balanced-match "^0.4.1"
+    concat-map "0.0.1"
+
+browser-stdout@1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.0.tgz#f351d32969d32fa5d7a5567154263d928ae3bd1f"
+
+commander@2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
+  dependencies:
+    graceful-readlink ">= 1.0.0"
+
+concat-map@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
+
+debug@2.2.0, debug@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
+  dependencies:
+    ms "0.7.1"
+
+diff@1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-1.4.0.tgz#7f28d2eb9ee7b15a97efd89ce63dcfdaa3ccbabf"
+
+double-ended-queue@^2.1.0-0:
+  version "2.1.0-0"
+  resolved "https://registry.yarnpkg.com/double-ended-queue/-/double-ended-queue-2.1.0-0.tgz#103d3527fd31528f40188130c841efdd78264e5c"
+
+escape-string-regexp@1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
+
+flexbuffer@0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/flexbuffer/-/flexbuffer-0.0.6.tgz#039fdf23f8823e440c38f3277e6fef1174215b30"
+
+fs.realpath@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
+
+glob@7.0.5:
+  version "7.0.5"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.0.5.tgz#b4202a69099bbb4d292a7c1b95b6682b67ebdc95"
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.2"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+"graceful-readlink@>= 1.0.0":
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
+
+growl@1.9.2:
+  version "1.9.2"
+  resolved "https://registry.yarnpkg.com/growl/-/growl-1.9.2.tgz#0ea7743715db8d8de2c5ede1775e1b45ac85c02f"
+
+has-flag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
+
+inflight@^1.0.4:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
+  dependencies:
+    once "^1.3.0"
+    wrappy "1"
+
+inherits@2:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+
+ioredis@1.15.1:
+  version "1.15.1"
+  resolved "https://registry.yarnpkg.com/ioredis/-/ioredis-1.15.1.tgz#525255cccd557bdd38a0ed3466199f59eb0b9d1c"
+  dependencies:
+    bluebird "^2.9.34"
+    debug "^2.2.0"
+    double-ended-queue "^2.1.0-0"
+    flexbuffer "0.0.6"
+    lodash "^3.6.0"
+
+json3@3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/json3/-/json3-3.3.2.tgz#3c0434743df93e2f5c42aee7b19bcb483575f4e1"
+
+lodash._baseassign@^3.0.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
+  dependencies:
+    lodash._basecopy "^3.0.0"
+    lodash.keys "^3.0.0"
+
+lodash._basecopy@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/lodash._basecopy/-/lodash._basecopy-3.0.1.tgz#8da0e6a876cf344c0ad8a54882111dd3c5c7ca36"
+
+lodash._basecreate@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash._basecreate/-/lodash._basecreate-3.0.3.tgz#1bc661614daa7fc311b7d03bf16806a0213cf821"
+
+lodash._getnative@^3.0.0:
+  version "3.9.1"
+  resolved "https://registry.yarnpkg.com/lodash._getnative/-/lodash._getnative-3.9.1.tgz#570bc7dede46d61cdcde687d65d3eecbaa3aaff5"
+
+lodash._isiterateecall@^3.0.0:
+  version "3.0.9"
+  resolved "https://registry.yarnpkg.com/lodash._isiterateecall/-/lodash._isiterateecall-3.0.9.tgz#5203ad7ba425fae842460e696db9cf3e6aac057c"
+
+lodash.create@3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/lodash.create/-/lodash.create-3.1.1.tgz#d7f2849f0dbda7e04682bb8cd72ab022461debe7"
+  dependencies:
+    lodash._baseassign "^3.0.0"
+    lodash._basecreate "^3.0.0"
+    lodash._isiterateecall "^3.0.0"
+
+lodash.isarguments@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz#2f573d85c6a24289ff00663b491c1d338ff3458a"
+
+lodash.isarray@^3.0.0:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/lodash.isarray/-/lodash.isarray-3.0.4.tgz#79e4eb88c36a8122af86f844aa9bcd851b5fbb55"
+
+lodash.keys@^3.0.0:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/lodash.keys/-/lodash.keys-3.1.2.tgz#4dbc0472b156be50a0b286855d1bd0b0c656098a"
+  dependencies:
+    lodash._getnative "^3.0.0"
+    lodash.isarguments "^3.0.0"
+    lodash.isarray "^3.0.0"
+
+lodash@^3.6.0:
+  version "3.10.1"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
+
+minimatch@^3.0.2:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
+  dependencies:
+    brace-expansion "^1.0.0"
+
+minimist@0.0.8:
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+
+mkdirp@0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  dependencies:
+    minimist "0.0.8"
+
+mocha@*:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-3.2.0.tgz#7dc4f45e5088075171a68896814e6ae9eb7a85e3"
+  dependencies:
+    browser-stdout "1.3.0"
+    commander "2.9.0"
+    debug "2.2.0"
+    diff "1.4.0"
+    escape-string-regexp "1.0.5"
+    glob "7.0.5"
+    growl "1.9.2"
+    json3 "3.3.2"
+    lodash.create "3.1.1"
+    mkdirp "0.5.1"
+    supports-color "3.1.2"
+
+ms@0.7.1:
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"
+
+once@^1.3.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  dependencies:
+    wrappy "1"
+
+path-is-absolute@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
+
+redis-commands@^1.1.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/redis-commands/-/redis-commands-1.3.1.tgz#81d826f45fa9c8b2011f4cd7a0fe597d241d442b"
+
+redis-parser@^1.2.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/redis-parser/-/redis-parser-1.3.0.tgz#806ebe7bbfb7d34e4d7c1e9ef282efcfad04126a"
+
+redis@2.6.0-1:
+  version "2.6.0-1"
+  resolved "https://registry.yarnpkg.com/redis/-/redis-2.6.0-1.tgz#d6feb32cf08a734ba7f7f776699363ef69e3b9b4"
+  dependencies:
+    double-ended-queue "^2.1.0-0"
+    redis-commands "^1.1.0"
+    redis-parser "^1.2.0"
+
+should-equal@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/should-equal/-/should-equal-1.0.1.tgz#0b6e9516f2601a9fb0bb2dcc369afa1c7e200af7"
+  dependencies:
+    should-type "^1.0.0"
+
+should-format@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/should-format/-/should-format-3.0.2.tgz#1a543ad3abfea5dc2bea4a0ba875ede60fe22b19"
+  dependencies:
+    should-type "^1.3.0"
+    should-type-adaptors "^1.0.1"
+
+should-type-adaptors@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/should-type-adaptors/-/should-type-adaptors-1.0.1.tgz#efe5553cdf68cff66e5c5f51b712dc351c77beaa"
+  dependencies:
+    should-type "^1.3.0"
+    should-util "^1.0.0"
+
+should-type@^1.0.0, should-type@^1.3.0, should-type@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/should-type/-/should-type-1.4.0.tgz#0756d8ce846dfd09843a6947719dfa0d4cff5cf3"
+
+should-util@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/should-util/-/should-util-1.0.0.tgz#c98cda374aa6b190df8ba87c9889c2b4db620063"
+
+should@*:
+  version "11.2.0"
+  resolved "https://registry.yarnpkg.com/should/-/should-11.2.0.tgz#7afca3182c234781d786d2278a87805b5ecf0409"
+  dependencies:
+    should-equal "^1.0.0"
+    should-format "^3.0.2"
+    should-type "^1.4.0"
+    should-type-adaptors "^1.0.1"
+    should-util "^1.0.0"
+
+supports-color@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.1.2.tgz#72a262894d9d408b956ca05ff37b2ed8a6e2a2d5"
+  dependencies:
+    has-flag "^1.0.0"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"