diff --git a/composer.json b/composer.json
index 234ad84..9fb50d2 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "php-http/discovery": "^1.19",
         "psr/http-client": "^1.0",
         "psr/http-factory": "^1.0",
-        "psr/http-message": "^1.0",
+        "psr/http-message": "^2.0",
         "psr/http-server-handler": "^1.0"
     },
     "require-dev": {