diff --git a/composer.json b/composer.json
index c2e4254..229d536 100644
--- a/composer.json
+++ b/composer.json
@@ -20,8 +20,8 @@
         "php" : "^5.5|^7.0",
         "illuminate/support": "^5.3",
         "illuminate/http": "^5.3",
-        "symfony/dom-crawler": "^2.7|^3.0",
-        "symfony/css-selector": "^2.7|^3.0"
+        "symfony/dom-crawler": "^2.7|^3.0|^4.0",
+        "symfony/css-selector": "^2.7|^3.0|^4.0"
     },
     "require-dev": {
         "phpunit/phpunit" : "^4.0|^5.0",