diff --git a/package.json b/package.json
index 62581782d7..3e609db87f 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "jsdom": "25.0.1",
     "playwright": "^1.46.1",
     "prettier": "^3.2.4",
-    "prettier-plugin-svelte": "^3.1.2",
+    "prettier-plugin-svelte": "^3.4.0",
     "svelte": "workspace:^",
     "typescript": "^5.5.4",
     "typescript-eslint": "^8.24.0",
diff --git a/playgrounds/sandbox/Wrapper.svelte b/playgrounds/sandbox/Wrapper.svelte
new file mode 100644
index 0000000000..1fe82c1716
--- /dev/null
+++ b/playgrounds/sandbox/Wrapper.svelte
@@ -0,0 +1,9 @@
+<script>
+	import App from './src/App.svelte';
+</script>
+
+<svelte:boundary>
+	<App />
+
+	{#snippet pending()}{/snippet}
+</svelte:boundary>
diff --git a/playgrounds/sandbox/index.html b/playgrounds/sandbox/index.html
index d70409ffb6..639409b877 100644
--- a/playgrounds/sandbox/index.html
+++ b/playgrounds/sandbox/index.html
@@ -12,7 +12,7 @@
 
 		<script type="module">
 			import { mount, hydrate, unmount } from 'svelte';
-			import App from '/src/App.svelte';
+			import App from '/Wrapper.svelte';
 
 			globalThis.delayed = (v, ms = 1000) => {
 				return new Promise((f) => {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 87fb2b2667..d0982dc791 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -39,8 +39,8 @@ importers:
         specifier: ^3.2.4
         version: 3.2.4
       prettier-plugin-svelte:
-        specifier: ^3.1.2
-        version: 3.1.2(prettier@3.2.4)(svelte@packages+svelte)
+        specifier: ^3.4.0
+        version: 3.4.0(prettier@3.2.4)(svelte@packages+svelte)
       svelte:
         specifier: workspace:^
         version: link:packages/svelte
@@ -1906,8 +1906,8 @@ packages:
     resolution: {integrity: sha512-vkcDPrRZo1QZLbn5RLGPpg/WmIQ65qoWWhcGKf/b5eplkkarX0m9z8ppCat4mlOqUsWpyNuYgO3VRyrYHSzX5g==}
     engines: {node: '>= 0.8.0'}
 
-  prettier-plugin-svelte@3.1.2:
-    resolution: {integrity: sha512-7xfMZtwgAWHMT0iZc8jN4o65zgbAQ3+O32V6W7pXrqNvKnHnkoyQCGCbKeUyXKZLbYE0YhFRnamfxfkEGxm8qA==}
+  prettier-plugin-svelte@3.4.0:
+    resolution: {integrity: sha512-pn1ra/0mPObzqoIQn/vUTR3ZZI6UuZ0sHqMK5x2jMLGrs53h0sXhkVuDcrlssHwIMk7FYrMjHBPoUSyyEEDlBQ==}
     peerDependencies:
       prettier: ^3.0.0
       svelte: ^3.2.0 || ^4.0.0-next.0 || ^5.0.0-next.0
@@ -4226,7 +4226,7 @@ snapshots:
 
   prelude-ls@1.2.1: {}
 
-  prettier-plugin-svelte@3.1.2(prettier@3.2.4)(svelte@packages+svelte):
+  prettier-plugin-svelte@3.4.0(prettier@3.2.4)(svelte@packages+svelte):
     dependencies:
       prettier: 3.2.4
       svelte: link:packages/svelte