diff --git a/.travis.yml b/.travis.yml
index 7f9ad86..5d58c2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,6 @@ cache:
         - $HOME/.composer/cache
 
 php:
-  - 5.4
-  - 5.5
   - 5.6
   - 7.0
   - 7.1
diff --git a/composer.json b/composer.json
index 680fc88..04bb51b 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
 		"issues": "https://github.com/Kdyby/DoctrineCollectionsReadonly/issues"
 	},
 	"require": {
-		"php": ">=5.4",
+		"php": "^5.6 || ^7.0",
 		"doctrine/collections": "~1.1"
 	},
 	"require-dev": {