diff --git a/composer.json b/composer.json
index 8900441d..46046a5e 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     ],
     "minimum-stability": "dev",
     "require": {
-        "php": "^5.6|^7.1"
+        "php": "^5.6|^7.1|^7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^7"