diff --git a/composer.json b/composer.json
index c13bae1..55668df 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "php": ">=7.3",
         "ext-intl": "*",
         "pcrov/unicode": "^0.1",
-        "psr/http-message": "^1"
+        "psr/http-message": "^1.0 || ^2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",