diff --git a/composer.json b/composer.json
index 69861a2..152e350 100644
--- a/composer.json
+++ b/composer.json
@@ -23,11 +23,11 @@
         }
     ],
     "require":     {
-        "php":       "^5.5|^7.0",
+        "php":       "^5.5 || ^7.0",
         "psr/cache": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit":         "^4.1|^5.1",
+        "phpunit/phpunit":         "^4.0 || ^5.1",
         "cache/integration-tests": "^0.10",
         "symfony/cache":           "dev-master"
     },