diff --git a/composer.json b/composer.json
index 5b3a754..9a041a2 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "potter/controller": ">=0.0.1",
         "potter/response": ">=0.0.1",
         "potter/router": ">=0.0.1",
-        "psr/http-message": "^2.0.0",
+        "psr/http-message": "^1.1.0",
         "twbs/bootstrap": "^5.3.8"
     }
 }