diff --git a/.travis.yml b/.travis.yml
index 2659d19..0ef27a3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,6 @@ php:
   - 5.6
   - 5.5
   - 5.4
-  - 5.3
   - hhvm
 
 matrix:
diff --git a/composer.json b/composer.json
index d0a35f7..84128f8 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
 	"require-dev": {
 		"firephp/firephp-core": "~0.4.0",
 		"leafo/lessphp": "~0.4.0",
-		"leafo/scssphp": "^0.3.0",
+		"leafo/scssphp": "~0.6.6",
 		"meenie/javascript-packer": "~1.1",
 		"phpunit/phpunit": "4.8.*",
 		"tedivm/jshrink": "~1.1.0"
diff --git a/tests/ScssSourceTest.php b/tests/ScssSourceTest.php
index c37ca36..a8123dd 100644
--- a/tests/ScssSourceTest.php
+++ b/tests/ScssSourceTest.php
@@ -4,6 +4,10 @@ class ScssSourceTest extends TestCase
 {
     public function setUp()
     {
+        if (version_compare(PHP_VERSION, '5.4.0', '<')) {
+            $this->markTestSkipped('scssphp is not compatible with this PHP version.');
+        }
+
         $this->realDocRoot = $_SERVER['DOCUMENT_ROOT'];
         $_SERVER['DOCUMENT_ROOT'] = self::$document_root;
     }