diff --git a/cmd/frontend/articles.go b/cmd/frontend/articles.go
index fd6bef0..8e6263d 100644
--- a/cmd/frontend/articles.go
+++ b/cmd/frontend/articles.go
@@ -502,7 +502,7 @@ func UploadArticleImage(c *b.Config, s *b.CookieStore) http.HandlerFunc {
 			return
 		}
 
-		url := fmt.Sprint(c.Domain, "/image/serve/", filename)
+		url := fmt.Sprint(c.Domain, c.Port, "/image/serve/", filename)
 		w.Header().Set("Content-Type", "application/json")
 		json.NewEncoder(w).Encode(url)
 	}