diff --git a/.travis.yml b/.travis.yml
index ac5f63f..6c541f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.4
   - 5.5
   - 5.6
   - 7.0
diff --git a/composer.json b/composer.json
index 4ac213e..28271fd 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
-        "pimple/pimple": "~3.0",
+        "php": ">=5.5.0",
         "psr/http-message": "^1.0"
     },
     "require-dev": {
diff --git a/src/Cache.php b/src/Cache.php
index 56eaf2b..287007f 100644
--- a/src/Cache.php
+++ b/src/Cache.php
@@ -1,8 +1,6 @@
 <?php
 namespace Slim\HttpCache;
 
-use Pimple\Container;
-use Pimple\ServiceProviderInterface;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;