diff --git a/composer.json b/composer.json
index 6747a1ea80b0ed10694268c5db71ee374d3f31de..16323bb1f1463c1341eb16f5563d0ae2504d2664 100644
--- a/composer.json
+++ b/composer.json
@@ -10,13 +10,13 @@
     }
   ],
   "require": {
-    "php": "^7.1",
+    "php": "^7.1 | ^8.0",
     "ext-json": "*",
     "beberlei/assert": "^3.2",
-    "irstea/php-cs-fixer-shim": "^2.16"
+    "irstea/php-cs-fixer-shim": "^2.18"
   },
   "require-dev": {
-    "irstea/composer-require-checker-shim": "^2.0.0",
+    "irstea/composer-require-checker-shim": "@stable",
     "mikey179/vfsstream": "^1.6",
     "phpunit/phpunit": ">=7.5"
   },