diff --git a/package-lock.json b/package-lock.json
index eeef42a72c..69a47c2ae0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "license": "MIT",
       "devDependencies": {
         "@ampproject/remapping": "^0.3.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14",
         "@rollup/plugin-commonjs": "^11.0.0",
         "@rollup/plugin-json": "^4.0.1",
         "@rollup/plugin-node-resolve": "^11.2.1",
@@ -44,7 +45,6 @@
         "rollup": "^1.27.14",
         "source-map": "^0.7.4",
         "source-map-support": "^0.5.21",
-        "sourcemap-codec": "^1.4.8",
         "tiny-glob": "^0.2.9",
         "tslib": "^2.4.1",
         "typescript": "^3.7.5",
@@ -162,6 +162,12 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.4.14",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.14.tgz",
+      "integrity": "sha512-XPSJHWmi394fuUuzDnGz1wiKqWfo1yXecHQMRf2l6hztTO+nPru658AyDngaBe7isIxEkRsPR3FZh+s7iVa4Uw==",
+      "dev": true
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -5373,6 +5379,12 @@
       "integrity": "sha512-9oLAnygRMi8Q5QkYEU4XWK04B+nuoXoxjRvRxgjuChkLZFBja0YPSgdZ7dZtwhncLBcQe/I/E+fLuk5qxcYVJA==",
       "dev": true
     },
+    "@jridgewell/sourcemap-codec": {
+      "version": "1.4.14",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.14.tgz",
+      "integrity": "sha512-XPSJHWmi394fuUuzDnGz1wiKqWfo1yXecHQMRf2l6hztTO+nPru658AyDngaBe7isIxEkRsPR3FZh+s7iVa4Uw==",
+      "dev": true
+    },
     "@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
diff --git a/package.json b/package.json
index 8839b95c75..ec8638fbf4 100644
--- a/package.json
+++ b/package.json
@@ -120,6 +120,7 @@
   "homepage": "https://svelte.dev",
   "devDependencies": {
     "@ampproject/remapping": "^0.3.0",
+    "@jridgewell/sourcemap-codec": "^1.4.14",
     "@rollup/plugin-commonjs": "^11.0.0",
     "@rollup/plugin-json": "^4.0.1",
     "@rollup/plugin-node-resolve": "^11.2.1",
@@ -154,7 +155,6 @@
     "rollup": "^1.27.14",
     "source-map": "^0.7.4",
     "source-map-support": "^0.5.21",
-    "sourcemap-codec": "^1.4.8",
     "tiny-glob": "^0.2.9",
     "tslib": "^2.4.1",
     "typescript": "^3.7.5",