diff --git a/package-lock.json b/package-lock.json
index ececbf466c..82818bfde7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -60,7 +60,7 @@
         "rollup": "^4.59.0",
         "rollup-plugin-dts": "^6.4.0",
         "shx": "^0.4.0",
-        "tsdown": "^0.21.2",
+        "tsdown": "^0.21.3",
         "tsup": "^8.5.1",
         "typescript": "~5.9.3",
         "typescript-eslint": "^8.57.0",
@@ -15441,9 +15441,9 @@
       }
     },
     "node_modules/flatted": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.3.tgz",
-      "integrity": "sha512-GX+ysw4PBCz0PzosHDepZGANEuFCMLrnRTiEy9McGjmkCQYwRq4A/X786G/fjM/+OjsWSU1ZrY5qyARZmO/uwg==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.4.1.tgz",
+      "integrity": "sha512-IxfVbRFVlV8V/yRaGzk0UVIcsKKHMSfYw66T/u4nTwlWteQePsxe//LjudR1AMX4tZW3WFCh3Zqa/sjlqpbURQ==",
       "dev": true,
       "license": "ISC"
     },
@@ -26443,9 +26443,9 @@
       "license": "MIT"
     },
     "node_modules/tinyexec": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.0.2.tgz",
-      "integrity": "sha512-W/KYk+NFhkmsYpuHq5JykngiOCnxeVL8v8dFnqxSD8qEEdRfXk1SDM6JzNqcERbcGYj9tMrDQBYV9cjgnunFIg==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.0.4.tgz",
+      "integrity": "sha512-u9r3uZC0bdpGOXtlxUIdwf9pkmvhqJdrVCH9fapQtgy/OeTTMZ1nqH7agtvEfmGui6e1XxjcdrlxvxJvc3sMqw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -26707,9 +26707,9 @@
       }
     },
     "node_modules/tsdown": {
-      "version": "0.21.2",
-      "resolved": "https://registry.npmjs.org/tsdown/-/tsdown-0.21.2.tgz",
-      "integrity": "sha512-pP8eAcd1XAWjl5gjosuJs0BAuVoheUe3V8VDHx31QK7YOgXjcCMsBSyFWO3CMh/CSUkjRUzR96JtGH3WJFTExQ==",
+      "version": "0.21.3",
+      "resolved": "https://registry.npmjs.org/tsdown/-/tsdown-0.21.3.tgz",
+      "integrity": "sha512-oKKeMC8+IgNsB+81hvF5VBsqhqL/nr0g9vse+ujbK40vv0i3ReFI6gUts7hQH7J53ylQNjMgf2Vu6n0+P/uddA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -26724,7 +26724,7 @@
         "rolldown": "1.0.0-rc.9",
         "rolldown-plugin-dts": "^0.22.5",
         "semver": "^7.7.4",
-        "tinyexec": "^1.0.2",
+        "tinyexec": "^1.0.4",
         "tinyglobby": "^0.2.15",
         "tree-kill": "^1.2.2",
         "unconfig-core": "^7.5.0",
@@ -26741,8 +26741,8 @@
       },
       "peerDependencies": {
         "@arethetypeswrong/core": "^0.18.1",
-        "@tsdown/css": "0.21.2",
-        "@tsdown/exe": "0.21.2",
+        "@tsdown/css": "0.21.3",
+        "@tsdown/exe": "0.21.3",
         "@vitejs/devtools": "*",
         "publint": "^0.3.0",
         "typescript": "^5.0.0",
@@ -27101,9 +27101,9 @@
       "license": "MIT"
     },
     "node_modules/undici": {
-      "version": "7.21.0",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-7.21.0.tgz",
-      "integrity": "sha512-Hn2tCQpoDt1wv23a68Ctc8Cr/BHpUSfaPYrkajTXOS9IKpxVRx/X5m1K2YkbK2ipgZgxXSgsUinl3x+2YdSSfg==",
+      "version": "7.24.3",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.24.3.tgz",
+      "integrity": "sha512-eJdUmK/Wrx2d+mnWWmwwLRyA7OQCkLap60sk3dOK4ViZR7DKwwptwuIvFBg2HaiP9ESaEdhtpSymQPvytpmkCA==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -30077,8 +30077,8 @@
         "@tsconfig/svelte": "^5.0.8",
         "@types/vscode-webview": "^1.57.5",
         "@vscode/codicons": "^0.0.45",
-        "svelte": "^5.53.11",
-        "svelte-check": "^4.4.4",
+        "svelte": "^5.53.12",
+        "svelte-check": "^4.4.5",
         "svelte-preprocess": "^6.0.3",
         "typescript": "~5.9.3",
         "vite": "^8.0.0"
@@ -30206,9 +30206,9 @@
       }
     },
     "packages/webview-ui/node_modules/svelte": {
-      "version": "5.53.11",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.53.11.tgz",
-      "integrity": "sha512-GYmqRjRhJYLQBonfdfGAt28gkfWEShrtXKGXcFGneXi502aBE+I1dJcs/YQriByvP6xqXRz/OdBGC6tfvUQHyQ==",
+      "version": "5.53.12",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.53.12.tgz",
+      "integrity": "sha512-4x/uk4rQe/d7RhfvS8wemTfNjQ0bJbKvamIzRBfTe2eHHjzBZ7PZicUQrC2ryj83xxEacfA1zHKd1ephD1tAxA==",
       "license": "MIT",
       "dependencies": {
         "@jridgewell/remapping": "^2.3.4",
@@ -30220,7 +30220,7 @@
         "aria-query": "5.3.1",
         "axobject-query": "^4.1.0",
         "clsx": "^2.1.1",
-        "devalue": "^5.6.3",
+        "devalue": "^5.6.4",
         "esm-env": "^1.2.1",
         "esrap": "^2.2.2",
         "is-reference": "^3.0.3",
diff --git a/package.json b/package.json
index b498f8dfae..651b047327 100644
--- a/package.json
+++ b/package.json
@@ -4657,7 +4657,7 @@
     "rollup": "^4.59.0",
     "rollup-plugin-dts": "^6.4.0",
     "shx": "^0.4.0",
-    "tsdown": "^0.21.2",
+    "tsdown": "^0.21.3",
     "tsup": "^8.5.1",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.57.0",
diff --git a/packages/webview-ui/package.json b/packages/webview-ui/package.json
index 54d44b7bc2..ba6eda217b 100644
--- a/packages/webview-ui/package.json
+++ b/packages/webview-ui/package.json
@@ -32,7 +32,7 @@
     "@tsconfig/svelte": "^5.0.8",
     "@types/vscode-webview": "^1.57.5",
     "@vscode/codicons": "^0.0.45",
-    "svelte": "^5.53.11",
+    "svelte": "^5.53.12",
     "svelte-check": "^4.4.5",
     "svelte-preprocess": "^6.0.3",
     "typescript": "~5.9.3",