diff --git a/app/srv/api/prod.ts b/app/srv/api/prod.ts
index 69d08b7b..268f3004 100644
--- a/app/srv/api/prod.ts
+++ b/app/srv/api/prod.ts
@@ -89,8 +89,8 @@ export const _ = {
           const arr = pathname.split("/").slice(2);
           const codepath = arr.join("/");
           const build_path = code.path(site_id, "site", "build", codepath);
+          const build_old = code.path(site_id, "site", "build_old", codepath);
 
-          
           try {
             let file = Bun.file(build_path);
 
@@ -104,15 +104,29 @@ export const _ = {
               }
             );
           } catch (e: any) {
-            return new Response(
-              `
+            try {
+              let file = Bun.file(build_old);
+
+              return new Response(
+                await gzipAsync(new Uint8Array(await file.arrayBuffer())),
+                {
+                  headers: {
+                    "content-encoding": "gzip",
+                    "content-type": mime.getType(build_path) || "",
+                  },
+                }
+              );
+            } catch (e) {
+              return new Response(
+                `
               console.error("Failed to load index.js")
               console.error("${e.message}")
 `,
-              {
-                headers: { "content-type": "application/javascript" },
-              }
-            );
+                {
+                  headers: { "content-type": "application/javascript" },
+                }
+              );
+            }
           }
         }
         case "route": {
diff --git a/app/srv/ws/sync/code/code.ts b/app/srv/ws/sync/code/code.ts
index f65b026b..0367e763 100644
--- a/app/srv/ws/sync/code/code.ts
+++ b/app/srv/ws/sync/code/code.ts
@@ -26,7 +26,7 @@ export const code = {
   path(
     id_site: string,
     mode: "site" | "server",
-    type: "src" | "build" | "build_cache",
+    type: "src" | "build" | "build_old" | "build_cache",
     path?: string
   ) {
     let file_path = "";
diff --git a/app/srv/ws/sync/code/parts/init/frontend.ts b/app/srv/ws/sync/code/parts/init/frontend.ts
index 444f1aeb..c8a875ed 100644
--- a/app/srv/ws/sync/code/parts/init/frontend.ts
+++ b/app/srv/ws/sync/code/parts/init/frontend.ts
@@ -216,7 +216,6 @@ import React from "react";
                   await codeError(id_site, "");
                   await $`mv ${out_dir} ${out_dir_old}`.quiet();
                   await $`mv ${out_dir_temp} ${out_dir}`.quiet();
-                  await $`rm -rf ${out_dir_old}`.quiet();
 
                   const now = Date.now();
                   client_ids.forEach((client_id) => {