diff --git a/composer.json b/composer.json
index 9be24c4..b12892a 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         "php": "^7.4|^8.0",
         "psr/log": "^1.0|^2.0|^3.0",
         "firebase/php-jwt": "^3.0|^4.0|^5.0",
-        "psr/http-message": "^1.0",
+        "psr/http-message": "^1.0|^2.0",
         "tuupola/http-factory": "^1.3",
         "tuupola/callable-handler": "^1.0",
         "psr/http-server-middleware": "^1.0"