diff --git a/composer.json b/composer.json
index 8879c85..5ea11d5 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,7 @@
         "psr-7",
         "psr-15",
         "psr-11",
+        "psr-17",
         "middleware",
         "http"
     ],