diff --git a/composer.json b/composer.json
index 0b78b90..5b01b1c 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,8 @@
         "symfony/filesystem": "2.1.*"
     },
     "require-dev": {
-        "symfony/browser-kit": "2.1.*"
+        "symfony/browser-kit": "2.1.*",
+        "symfony/css-selector": "2.1.*"
     },
     "minimum-stability": "dev",
     "autoload": {
diff --git a/composer.lock b/composer.lock
index 53f2b79..a889d8e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,5 +1,5 @@
 {
-    "hash": "e55cdcd1112ac8bf527b6aa80169c989",
+    "hash": "c2194c61493cf0a4e1eb174105b65fe6",
     "packages": [
         {
             "package": "pimple/pimple",
@@ -107,6 +107,18 @@
             "source-reference": "v2.1.0-BETA4",
             "commit-date": "1342347231"
         },
+        {
+            "package": "symfony/css-selector",
+            "version": "dev-master",
+            "alias-pretty-version": "2.1.x-dev",
+            "alias-version": "2.1.9999999.9999999-dev"
+        },
+        {
+            "package": "symfony/css-selector",
+            "version": "dev-master",
+            "source-reference": "v2.1.0-BETA4",
+            "commit-date": "1342347231"
+        },
         {
             "package": "symfony/dom-crawler",
             "version": "dev-master",