diff --git a/bower.json b/bower.json
index 60214479..f2970141 100644
--- a/bower.json
+++ b/bower.json
@@ -1,7 +1,7 @@
 {
   "name": "neo-async",
   "main": "lib/async.js",
-  "version": "2.5.1",
+  "version": "2.5.2",
   "homepage": "https://github.com/suguru03/neo-async",
   "authors": [
     "Suguru Motegi"
diff --git a/dist/async.js b/dist/async.js
index 55db32ce..a891d295 100644
--- a/dist/async.js
+++ b/dist/async.js
@@ -1964,11 +1964,11 @@
   var dir = createLogger('dir');
 
   /**
-   * @version 2.5.1
+   * @version 2.5.2
    * @namespace async
    */
   var index = {
-    VERSION: '2.5.1',
+    VERSION: '2.5.2',
 
     // Collections
     each: each,
@@ -8861,9 +8861,11 @@
       args.push(done);
       fn.apply(null, args);
 
-      function done() {
+      function done(err) {
         var args = createArray(arguments);
-        memo[key] = args;
+        if (!err) {
+          memo[key] = args;
+        }
         var q = queues[key];
         delete queues[key];
 
diff --git a/dist/async.min.js b/dist/async.min.js
index b5bec295..e54dda4a 100644
--- a/dist/async.min.js
+++ b/dist/async.min.js
@@ -1,77 +1,77 @@
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diff --git a/lib/async.js b/lib/async.js
index bda4a0c2..a891d295 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -1964,11 +1964,11 @@
   var dir = createLogger('dir');
 
   /**
-   * @version 2.5.1
+   * @version 2.5.2
    * @namespace async
    */
   var index = {
-    VERSION: '2.5.1',
+    VERSION: '2.5.2',
 
     // Collections
     each: each,
diff --git a/lib/async.min.js b/lib/async.min.js
index b5bec295..e54dda4a 100644
--- a/lib/async.min.js
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diff --git a/package.json b/package.json
index 97e23b3e..edadf225 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "neo-async",
-  "version": "2.5.1",
+  "version": "2.5.2",
   "description": "Neo-Async is thought to be used as a drop-in replacement for Async, it almost fully covers its functionality and runs faster ",
   "main": "index.js",
   "scripts": {