diff --git a/sites/svelte.dev/package-lock.json b/sites/svelte.dev/package-lock.json
index 6c2f724157..12ff957e2d 100644
--- a/sites/svelte.dev/package-lock.json
+++ b/sites/svelte.dev/package-lock.json
@@ -13,7 +13,8 @@
         "cookie": "^0.5.0",
         "devalue": "^4.2.3",
         "do-not-zip": "^1.0.0",
-        "flru": "^1.0.2"
+        "flru": "^1.0.2",
+        "sourcemap-codec": "^1.4.8"
       },
       "devDependencies": {
         "@resvg/resvg-js": "^2.2.0",
@@ -3295,6 +3296,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/sourcemap-codec": {
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+      "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
+      "deprecated": "Please use @jridgewell/sourcemap-codec instead"
+    },
     "node_modules/streamsearch": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz",
@@ -6124,6 +6131,11 @@
       "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
       "dev": true
     },
+    "sourcemap-codec": {
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+      "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA=="
+    },
     "streamsearch": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz",
diff --git a/sites/svelte.dev/package.json b/sites/svelte.dev/package.json
index f4c3123c07..9eb9420162 100644
--- a/sites/svelte.dev/package.json
+++ b/sites/svelte.dev/package.json
@@ -21,7 +21,8 @@
     "cookie": "^0.5.0",
     "devalue": "^4.2.3",
     "do-not-zip": "^1.0.0",
-    "flru": "^1.0.2"
+    "flru": "^1.0.2",
+    "sourcemap-codec": "^1.4.8"
   },
   "devDependencies": {
     "@resvg/resvg-js": "^2.2.0",
diff --git a/sites/svelte.dev/vite.config.js b/sites/svelte.dev/vite.config.js
index 981f629ad9..92e2d3c057 100644
--- a/sites/svelte.dev/vite.config.js
+++ b/sites/svelte.dev/vite.config.js
@@ -22,11 +22,6 @@ function raw(ext) {
 const config = {
 	logLevel: 'info',
 	plugins: [raw(['.ttf']), imagetools(), sveltekit()],
-	build: {
-		rollupOptions: {
-			external: ['sourcemap-codec'],
-		},
-	},
 	optimizeDeps: {
 		include: [
 			'codemirror',