diff --git a/.travis.yml b/.travis.yml
index cc81dbc..578a88d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ sudo: false
 language: php
 
 php:
+  - 7.0
+  - 7.1
   - 7.2
   - 7.3
   - 7.4
diff --git a/composer.json b/composer.json
index a7c6d19..a7d59b9 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,9 @@
             "email": "daniil@daniil.it"
         }
     ],
-    "require": {},
+    "require": {
+        "php": ">=7.0"
+    },
     "require-dev": {
         "phpunit/phpunit": "^8",
         "amphp/php-cs-fixer-config": "dev-master"