diff --git a/composer.json b/composer.json
index 481a621..ed7c7e7 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,6 @@
 {
     "require": {
+        "php": ">=7.0.0",
         "robmorgan/phinx": "^0.9.2",
         "league/oauth2-client": "^2.3",
         "league/oauth2-github": "^2.0",