diff --git a/composer.json b/composer.json
index d8138fb..01c55f2 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "psr/http-message": "^1.1 || ^2.0",
     "react/promise": "^3.2",
     "thecodingmachine/safe": "^2",
-    "wyrihaximus/metrics": "^2.1"
+    "wyrihaximus/metrics": "^2.1 || ^3.0"
   },
   "require-dev": {
     "nyholm/psr7": "^1.8",