diff --git a/.travis.yml b/.travis.yml
index 1146f23..10e56fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,8 @@ env:
   - TRAVIS_NODE_VERSION="5.3" CXX="g++-4.8"
 
 matrix:
+  fast_finish: true
   allow_failures:
-    - php: 5.5
     - php: nightly
 
 addons:
diff --git a/README.md b/README.md
index f487043..dce0152 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Sage is a WordPress starter theme based on HTML5 Boilerplate, gulp, Bower, and B
 
 | Prerequisite    | How to check | How to install
 | --------------- | ------------ | ------------- |
-| PHP >= 5.4.x    | `php -v`     | [php.net](http://php.net/manual/en/install.php) |
+| PHP >= 5.5.x    | `php -v`     | [php.net](http://php.net/manual/en/install.php) |
 | Node.js 0.12.x  | `node -v`    | [nodejs.org](http://nodejs.org/) |
 | gulp >= 3.8.10  | `gulp -v`    | `npm install -g gulp` |
 | Bower >= 1.3.12 | `bower -v`   | `npm install -g bower` |
diff --git a/composer.json b/composer.json
index 1028a69..c727464 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
     ]
   },
   "require": {
-    "php": ">=5.4.0",
+    "php": ">=5.5.0",
     "composer/installers": "~1.0"
   }
 }
diff --git a/composer.lock b/composer.lock
index 17854c8..3bb9cda 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,25 +4,25 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "7bb0b8d676ed7c711aca81f0c9e65355",
-    "content-hash": "d0ce163b056002fe67c8e8036573e276",
+    "hash": "bae0265fe64b728b3ad0fd3ab2ca2df0",
+    "content-hash": "75ad99c892e1d82404c58fe3bd989585",
     "packages": [
         {
             "name": "composer/installers",
-            "version": "v1.0.22",
+            "version": "v1.0.23",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/installers.git",
-                "reference": "bd9b14f094c89c8b5804a4e41edeb7853bb85046"
+                "reference": "6213d900e92647831f7a406d5c530ea1f3d4360e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/installers/zipball/bd9b14f094c89c8b5804a4e41edeb7853bb85046",
-                "reference": "bd9b14f094c89c8b5804a4e41edeb7853bb85046",
+                "url": "https://api.github.com/repos/composer/installers/zipball/6213d900e92647831f7a406d5c530ea1f3d4360e",
+                "reference": "6213d900e92647831f7a406d5c530ea1f3d4360e",
                 "shasum": ""
             },
             "require": {
-                "composer-plugin-api": "1.0.0"
+                "composer-plugin-api": "^1.0"
             },
             "replace": {
                 "roundcube/plugin-installer": "*",
@@ -103,7 +103,7 @@
                 "zend",
                 "zikula"
             ],
-            "time": "2015-10-29 23:28:48"
+            "time": "2016-01-27 12:54:22"
         }
     ],
     "packages-dev": [],
@@ -113,7 +113,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.4.0"
+        "php": ">=5.5.0"
     },
     "platform-dev": []
 }