diff --git a/package-lock.json b/package-lock.json
index 26b0bb79..9a15d0df 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,7 +26,7 @@
         "lint-staged": "^15.2.9",
         "prettier": "^3.3.3",
         "prettier-plugin-svelte": "^3.2.6",
-        "svelte-check": "^3.8.6",
+        "svelte-check": "^4.0.6",
         "svelte-preprocess": "^5.1.4",
         "tslib": "^2.7.0",
         "typescript": "^5.5.4"
@@ -9009,23 +9009,82 @@
       }
     },
     "node_modules/svelte-check": {
-      "version": "3.8.6",
-      "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-3.8.6.tgz",
-      "integrity": "sha512-ij0u4Lw/sOTREP13BdWZjiXD/BlHE6/e2e34XzmVmsp5IN4kVa3PWP65NM32JAgwjZlwBg/+JtiNV1MM8khu0Q==",
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-4.0.6.tgz",
+      "integrity": "sha512-2XwmQNJaKbenJbvu5at+DuRpvF4v73Zu7f0/WkMl1O7WDm/IfF+E13t8D0nnRiRcMsNYm9ufHyLwfeMEnebpdg==",
       "dev": true,
       "dependencies": {
-        "@jridgewell/trace-mapping": "^0.3.17",
-        "chokidar": "^3.4.1",
+        "@jridgewell/trace-mapping": "^0.3.25",
+        "chokidar": "^4.0.1",
+        "fdir": "^6.2.0",
         "picocolors": "^1.0.0",
-        "sade": "^1.7.4",
-        "svelte-preprocess": "^5.1.3",
-        "typescript": "^5.0.3"
+        "sade": "^1.7.4"
       },
       "bin": {
         "svelte-check": "bin/svelte-check"
       },
+      "engines": {
+        "node": ">= 18.0.0"
+      },
       "peerDependencies": {
-        "svelte": "^3.55.0 || ^4.0.0-next.0 || ^4.0.0 || ^5.0.0-next.0"
+        "svelte": "^4.0.0 || ^5.0.0-next.0",
+        "typescript": ">=5.0.0"
+      }
+    },
+    "node_modules/svelte-check/node_modules/chokidar": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.1.tgz",
+      "integrity": "sha512-n8enUVCED/KVRQlab1hr3MVpcVMvxtZjmEa956u+4YijlmQED223XMSYj2tLuKvr4jcCTzNNMpQDUer72MMmzA==",
+      "dev": true,
+      "dependencies": {
+        "readdirp": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "node_modules/svelte-check/node_modules/fdir": {
+      "version": "6.4.2",
+      "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.4.2.tgz",
+      "integrity": "sha512-KnhMXsKSPZlAhp7+IjUkRZKPb4fUyccpDrdFXbi4QL1qkmFh9kVY09Yox+n4MaOb3lHZ1Tv829C3oaaXoMYPDQ==",
+      "dev": true,
+      "peerDependencies": {
+        "picomatch": "^3 || ^4"
+      },
+      "peerDependenciesMeta": {
+        "picomatch": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/svelte-check/node_modules/picomatch": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
+      "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
+      "dev": true,
+      "optional": true,
+      "peer": true,
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/svelte-check/node_modules/readdirp": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.0.2.tgz",
+      "integrity": "sha512-yDMz9g+VaZkqBYS/ozoBJwaBhTbZo3UNYQHNRw1D3UFQB8oHB4uS/tAODO+ZLjGWmUbKnIlOWO+aaIiAxrUWHA==",
+      "dev": true,
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://paulmillr.com/funding/"
       }
     },
     "node_modules/svelte-hmr": {
@@ -9647,7 +9706,7 @@
         "@sveltejs/vite-plugin-svelte": "^3.1.2",
         "@vitejs/plugin-basic-ssl": "^1.0.2",
         "svelte": "^4.2.16",
-        "svelte-check": "^3.8.6",
+        "svelte-check": "^4.0.6",
         "tslib": "^2.7.0",
         "typescript": "^5.5.4",
         "vite": "^5.4.2"
@@ -9663,7 +9722,7 @@
         "@sveltejs/vite-plugin-svelte": "^3.1.2",
         "@vitejs/plugin-basic-ssl": "^1.0.2",
         "svelte": "^4.2.16",
-        "svelte-check": "^3.8.6",
+        "svelte-check": "^4.0.6",
         "tslib": "^2.7.0",
         "typescript": "^5.5.4",
         "vite": "^5.4.2"
diff --git a/package.json b/package.json
index ebf60705..2f23e056 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "lint-staged": "^15.2.9",
     "prettier": "^3.3.3",
     "prettier-plugin-svelte": "^3.2.6",
-    "svelte-check": "^3.8.6",
+    "svelte-check": "^4.0.6",
     "svelte-preprocess": "^5.1.4",
     "tslib": "^2.7.0",
     "typescript": "^5.5.4",
diff --git a/playground-sveltekit/package.json b/playground-sveltekit/package.json
index 71f1f839..45477f9d 100644
--- a/playground-sveltekit/package.json
+++ b/playground-sveltekit/package.json
@@ -12,7 +12,7 @@
     "@sveltejs/kit": "^2.5.24",
     "@sveltejs/vite-plugin-svelte": "^3.1.2",
     "svelte": "^4.2.16",
-    "svelte-check": "^3.8.6",
+    "svelte-check": "^4.0.6",
     "tslib": "^2.7.0",
     "typescript": "^5.5.4",
     "vite": "^5.4.2",
diff --git a/playground/package.json b/playground/package.json
index 64143473..0eef44d1 100644
--- a/playground/package.json
+++ b/playground/package.json
@@ -11,7 +11,7 @@
     "@sveltejs/vite-plugin-svelte": "^3.1.2",
     "@vitejs/plugin-basic-ssl": "^1.0.2",
     "svelte": "^4.2.16",
-    "svelte-check": "^3.8.6",
+    "svelte-check": "^4.0.6",
     "tslib": "^2.7.0",
     "typescript": "^5.5.4",
     "vite": "^5.4.2"