diff --git a/.changeset/honest-socks-thank.md b/.changeset/honest-socks-thank.md
new file mode 100644
index 0000000..f44de9a
--- /dev/null
+++ b/.changeset/honest-socks-thank.md
@@ -0,0 +1,5 @@
+---
+"@napolab/kv-response-cache": minor
+---
+
+add x-kv-cache header
diff --git a/src/middleware.ts b/src/middleware.ts
index 7d5e119..6c24a5f 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -21,7 +21,11 @@ export const kvCaches =
 
     const key = new URL(c.req.url).pathname;
     const response = await cache.match(key);
-    if (response) return response;
+    if (response) {
+      response.headers.set("X-KV-CACHE", "hit");
+
+      return response;
+    }
 
     await next();