diff --git a/backend/pkg/commons/version/version.go b/backend/pkg/commons/version/version.go
index 3d51e4345..33ffaf31e 100644
--- a/backend/pkg/commons/version/version.go
+++ b/backend/pkg/commons/version/version.go
@@ -16,7 +16,7 @@ var (
 
 func HttpMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		r.Header.Set("X-Beaconchain-Version", Version)
+		w.Header().Set("X-Beaconchain-Version", Version)
 		next.ServeHTTP(w, r)
 	})
 }