diff --git a/.travis.yml b/.travis.yml
index 46d6088..a437564 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,5 @@
 language: php
 php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - hhvm
-  - nightly
   - 7.0
   - 7.1
   - 7.2
diff --git a/composer.json b/composer.json
index 4fdab59..74dc85e 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         ]
     },
     "require": {
-        "php": ">=5.4.0"
+        "php": "^7.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.1"