diff --git a/server/index.js b/server/index.js
index c9e4c3f6..49196374 100644
--- a/server/index.js
+++ b/server/index.js
@@ -166,6 +166,14 @@ export default class Server {
         await this.serveStatic(req, res, p)
       },
 
+      '/_next/:buildId/manifest.js.map': async (req, res, params) => {
+        if (!this.dev) return this.send404(res)
+
+        this.handleBuildId(params.buildId, res)
+        const p = join(this.dir, this.dist, 'manifest.js.map')
+        await this.serveStatic(req, res, p)
+      },
+
       '/_next/:buildId/main.js': async (req, res, params) => {
         if (this.dev) {
           this.handleBuildId(params.buildId, res)