diff --git a/composer.json b/composer.json
index ca8089e07e3759761801c37d943a6a67ae8906eb..80676601778ed2e242e82614acbabfeb2d4f4f05 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
         }
     ],
     "require": {
+        "php": "^5.6 || ^7.0 || ^8.0",
         "irstea/composer-require-checker-shim": "@stable",
         "irstea/pcov-clobber-plugin": "@stable",
         "irstea/php-cs-fixer-config": "@stable",