diff --git a/composer.json b/composer.json
index 6ea9b0d..fb868bc 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,8 @@
 	"require": {
 		"php": ">=5.3.0",
 		"ext-pcntl": "*",
-		"colinmollenhour/credis": "1.2.*"
+		"colinmollenhour/credis": "1.2.*",
+		"psr/log": "1.0.0"
 	},
 	"suggest": {
 		"ext-proctitle": "Allows php-resque to rename the title of UNIX processes to show the status of a worker.",
diff --git a/composer.lock b/composer.lock
index 7140535..1a84e92 100644
--- a/composer.lock
+++ b/composer.lock
@@ -3,7 +3,7 @@
         "This file locks the dependencies of your project to a known state",
         "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file"
     ],
-    "hash": "1f551c3cdade1b7ff7d9e32a44eeb3dc",
+    "hash": "646010a06695709794f1bc38392e392f",
     "packages": [
         {
             "name": "colinmollenhour/credis",
@@ -42,21 +42,59 @@
             "description": "Credis is a lightweight interface to the Redis key-value store which wraps the phpredis library when available for better performance.",
             "homepage": "https://github.com/colinmollenhour/credis",
             "time": "2013-03-19 02:57:04"
+        },
+        {
+            "name": "psr/log",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log",
+                "reference": "1.0.0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://github.com/php-fig/log/archive/1.0.0.zip",
+                "reference": "1.0.0",
+                "shasum": ""
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "Psr\\Log\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "time": "2012-12-21 11:40:51"
         }
     ],
     "packages-dev": [
         {
             "name": "phpunit/php-code-coverage",
-            "version": "1.2.9",
+            "version": "1.2.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "1.2.9"
+                "reference": "1.2.11"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/1.2.9",
-                "reference": "1.2.9",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/1.2.11",
+                "reference": "1.2.11",
                 "shasum": ""
             },
             "require": {
@@ -65,6 +103,9 @@
                 "phpunit/php-text-template": ">=1.1.1@stable",
                 "phpunit/php-token-stream": ">=1.1.3@stable"
             },
+            "require-dev": {
+                "phpunit/phpunit": "3.7.*"
+            },
             "suggest": {
                 "ext-dom": "*",
                 "ext-xdebug": ">=2.0.5"
@@ -96,7 +137,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2013-02-26 18:55:56"
+            "time": "2013-05-23 18:23:24"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -278,16 +319,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "3.7.18",
+            "version": "3.7.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "3.7.18"
+                "reference": "3.7.21"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/3.7.18",
-                "reference": "3.7.18",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/3.7.21",
+                "reference": "3.7.21",
                 "shasum": ""
             },
             "require": {
@@ -301,7 +342,7 @@
                 "phpunit/php-text-template": ">=1.1.1",
                 "phpunit/php-timer": ">=1.0.2,<1.1.0",
                 "phpunit/phpunit-mock-objects": ">=1.2.0,<1.3.0",
-                "symfony/yaml": ">=2.2.0"
+                "symfony/yaml": ">=2.0,<3.0"
             },
             "require-dev": {
                 "pear-pear/pear": "1.9.4"
@@ -348,7 +389,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2013-03-07 21:45:39"
+            "time": "2013-05-23 18:54:29"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -401,17 +442,17 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v2.2.0",
+            "version": "v2.3.1",
             "target-dir": "Symfony/Component/Yaml",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/Yaml.git",
-                "reference": "v2.2.0-RC3"
+                "reference": "v2.3.1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/Yaml/zipball/v2.2.0-RC3",
-                "reference": "v2.2.0-RC3",
+                "url": "https://api.github.com/repos/symfony/Yaml/zipball/v2.3.1",
+                "reference": "v2.3.1",
                 "shasum": ""
             },
             "require": {
@@ -420,7 +461,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.2-dev"
+                    "dev-master": "2.3-dev"
                 }
             },
             "autoload": {
@@ -444,7 +485,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "http://symfony.com",
-            "time": "2013-01-27 16:49:19"
+            "time": "2013-05-10 18:12:13"
         }
     ],
     "aliases": [