diff --git a/composer.json b/composer.json
index 0fb30a4..f91f4b7 100644
--- a/composer.json
+++ b/composer.json
@@ -12,11 +12,11 @@
     }
   ],
   "require": {
-    "php": "^5.5 || ^7",
-    "symfony/css-selector": "^2.7|~3.0 || ^4.0"
+    "php": "^5.5 || ^7.0",
+    "symfony/css-selector": "^2.7 || ^3.0 || ^4.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "~4.8.35|~5.7"
+    "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
   },
   "autoload": {
     "psr-4": {
@@ -25,7 +25,7 @@
   },
   "extra": {
     "branch-alias": {
-      "dev-master": "2.0.x-dev"
+      "dev-master": "2.2.x-dev"
     }
   }
 }