diff --git a/src/RedisStore.js b/src/RedisStore.js
index e5a921a..ba3cb3a 100644
--- a/src/RedisStore.js
+++ b/src/RedisStore.js
@@ -25,6 +25,17 @@ const redis = require('redis');
  * 
  * Class RedisStore
  */
+
+async function SET_NX_EX (key, seconds, counter, incrIfExists) {
+  const OK = await this.client.sendCommand([
+    'SET', key, counter.toString(),
+    'NX',
+    'EX', seconds.toString()
+  ])
+  if (!OK) var counterUpdated = await this.client.incrBy(key, incrIfExists)
+  return counterUpdated
+}
+
 class RedisStore extends Store {
   /**
    * constructor
@@ -51,19 +62,21 @@ class RedisStore extends Store {
   async _hit(key, options, weight) {
 
     let [counter, dateEnd] = await this.client.multi().get(key).ttl(key).exec();
-    
+
     if(counter === null) {
       counter = weight;
       dateEnd = Date.now() + options.interval;
 
       const seconds = Math.ceil(options.interval / 1000);
-      await this.client.setEx(key, seconds.toString(), counter.toString());
+      const counterUpdated = await SET_NX_EX.call(this, key, seconds, counter, weight)
+      if (counterUpdated) { counter = counterUpdated }
     } else if (dateEnd === -2 || dateEnd === -1) {
       counter = counter + weight;
       dateEnd = Date.now() + options.interval;
 
       const seconds = Math.ceil(options.interval / 1000);
-      await this.client.setEx(key, seconds.toString(), counter.toString());
+      const counterUpdated = await SET_NX_EX.call(this, key, seconds, counter, weight)
+      if (counterUpdated) { counter = counterUpdated }
     } else {
       counter = await this.client.incrBy(key, weight);
     }