diff --git a/composer.json b/composer.json
index 4df120ba25..7f896af3f3 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
         "jms/serializer"                   : "~0.10",
         "justinrainbow/json-schema"        : "~1.3",
         "mediavorus/mediavorus"            : "~0.4.0",
-        "media-alchemyst/media-alchemyst"  : "dev-master",
+        "media-alchemyst/media-alchemyst"  : "~0.4",
         "monolog/monolog"                  : "~1.3",
         "mrclay/minify"                    : "~2.1.6",
         "neutron/silex-imagine-provider"   : "~0.1.0",
diff --git a/composer.lock b/composer.lock
index 50576ec33f..8f23472296 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "fadb1c02db78a5cbeec681a90b45fdf8",
+    "hash": "51c29e26e9366f0675b21bc0f69ecac5",
     "packages": [
         {
             "name": "alchemy-fr/tcpdf-clone",
@@ -1524,16 +1524,16 @@
         },
         {
             "name": "media-alchemyst/media-alchemyst",
-            "version": "dev-master",
+            "version": "0.4.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/alchemy-fr/Media-Alchemyst.git",
-                "reference": "62fec183416ce6dfdf22e832f0de3c7442a23598"
+                "reference": "0d7b04a5367929efd95edd68ab361dffa70bb8b5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/alchemy-fr/Media-Alchemyst/zipball/62fec183416ce6dfdf22e832f0de3c7442a23598",
-                "reference": "62fec183416ce6dfdf22e832f0de3c7442a23598",
+                "url": "https://api.github.com/repos/alchemy-fr/Media-Alchemyst/zipball/0d7b04a5367929efd95edd68ab361dffa70bb8b5",
+                "reference": "0d7b04a5367929efd95edd68ab361dffa70bb8b5",
                 "shasum": ""
             },
             "require": {
@@ -1593,7 +1593,7 @@
                 "video",
                 "video processing"
             ],
-            "time": "2014-10-20 07:22:23"
+            "time": "2015-01-14 15:28:58"
         },
         {
             "name": "mediavorus/mediavorus",
@@ -3290,12 +3290,12 @@
             "version": "v1.5.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/Behat/Mink.git",
+                "url": "https://github.com/minkphp/Mink.git",
                 "reference": "0769e6d9726c140a54dbf827a438c0f9912749fe"
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             "dist": {
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-                "url": "https://api.github.com/repos/Behat/Mink/zipball/0769e6d9726c140a54dbf827a438c0f9912749fe",
+                "url": "https://api.github.com/repos/minkphp/Mink/zipball/0769e6d9726c140a54dbf827a438c0f9912749fe",
                 "reference": "0769e6d9726c140a54dbf827a438c0f9912749fe",
                 "shasum": ""
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@@ -3345,12 +3345,12 @@
             "version": "v1.1.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/Behat/MinkBrowserKitDriver.git",
+                "url": "https://github.com/minkphp/MinkBrowserKitDriver.git",
                 "reference": "63960c8fcad4529faad1ff33e950217980baa64c"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Behat/MinkBrowserKitDriver/zipball/63960c8fcad4529faad1ff33e950217980baa64c",
+                "url": "https://api.github.com/repos/minkphp/MinkBrowserKitDriver/zipball/63960c8fcad4529faad1ff33e950217980baa64c",
                 "reference": "63960c8fcad4529faad1ff33e950217980baa64c",
                 "shasum": ""
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@@ -3451,12 +3451,12 @@
             "version": "v1.0.9",
             "source": {
                 "type": "git",
-                "url": "https://github.com/Behat/MinkGoutteDriver.git",
+                "url": "https://github.com/minkphp/MinkGoutteDriver.git",
                 "reference": "fa1b073b48761464feb0b05e6825da44b20118d8"
             },
             "dist": {
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-                "url": "https://api.github.com/repos/Behat/MinkGoutteDriver/zipball/fa1b073b48761464feb0b05e6825da44b20118d8",
+                "url": "https://api.github.com/repos/minkphp/MinkGoutteDriver/zipball/fa1b073b48761464feb0b05e6825da44b20118d8",
                 "reference": "fa1b073b48761464feb0b05e6825da44b20118d8",
                 "shasum": ""
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@@ -3502,12 +3502,12 @@
             "version": "v1.1.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/Behat/MinkSelenium2Driver.git",
+                "url": "https://github.com/minkphp/MinkSelenium2Driver.git",
                 "reference": "bcf1b537de37db6db0822d9e7bd97e600fd7a476"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Behat/MinkSelenium2Driver/zipball/bcf1b537de37db6db0822d9e7bd97e600fd7a476",
+                "url": "https://api.github.com/repos/minkphp/MinkSelenium2Driver/zipball/bcf1b537de37db6db0822d9e7bd97e600fd7a476",
                 "reference": "bcf1b537de37db6db0822d9e7bd97e600fd7a476",
                 "shasum": ""
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@@ -3614,12 +3614,12 @@
             "version": "v1.0.6",
             "source": {
                 "type": "git",
-                "url": "https://github.com/fabpot/Goutte.git",
+                "url": "https://github.com/FriendsOfPHP/Goutte.git",
                 "reference": "06a5451288ffddd204b10fa6c6f9ab2b86dd515d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/fabpot/Goutte/zipball/06a5451288ffddd204b10fa6c6f9ab2b86dd515d",
+                "url": "https://api.github.com/repos/FriendsOfPHP/Goutte/zipball/06a5451288ffddd204b10fa6c6f9ab2b86dd515d",
                 "reference": "06a5451288ffddd204b10fa6c6f9ab2b86dd515d",
                 "shasum": ""
             },
@@ -3655,9 +3655,7 @@
             "authors": [
                 {
                     "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com",
-                    "homepage": "http://fabien.potencier.org",
-                    "role": "Lead Developer"
+                    "email": "fabien@symfony.com"
                 }
             ],
             "description": "A simple PHP Web Scraper",
@@ -4109,11 +4107,11 @@
     "minimum-stability": "stable",
     "stability-flags": {
         "imagine/imagine": 20,
-        "media-alchemyst/media-alchemyst": 20,
         "phpexiftool/phpexiftool": 20,
         "doctrine/data-fixtures": 20
     },
     "prefer-stable": false,
+    "prefer-lowest": false,
     "platform": {
         "php": ">=5.3.3"
     },