diff --git a/package.json b/package.json
index 3c2c0d3..2efc3a1 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "@types/react-dom": "^19.1.5",
     "@types/react-syntax-highlighter": "^15.5.13",
     "@types/sql.js": "^1.4.9",
+    "@types/wicg-file-system-access": "^2023.10.6",
     "@typescript-eslint/eslint-plugin": "^8.32.1",
     "@typescript-eslint/parser": "^8.32.1",
     "@vitejs/plugin-react": "^4.4.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a212b87..58d6baf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -96,6 +96,9 @@ importers:
       '@types/sql.js':
         specifier: ^1.4.9
         version: 1.4.9
+      '@types/wicg-file-system-access':
+        specifier: ^2023.10.6
+        version: 2023.10.6
       '@typescript-eslint/eslint-plugin':
         specifier: ^8.32.1
         version: 8.32.1(@typescript-eslint/parser@8.32.1(eslint@9.27.0(jiti@2.4.2))(typescript@5.8.3))(eslint@9.27.0(jiti@2.4.2))(typescript@5.8.3)
@@ -1516,6 +1519,9 @@ packages:
   '@types/use-sync-external-store@0.0.6':
     resolution: {integrity: sha512-zFDAD+tlpf2r4asuHEj0XH6pY6i0g5NeAHPn+15wk3BV6JA69eERFXC1gyGThDkVa1zCyKr5jox1+2LbV/AMLg==}
 
+  '@types/wicg-file-system-access@2023.10.6':
+    resolution: {integrity: sha512-YO/183gNRzZFSdKu+ikkD7ambAj4PhgjFAF2A/Mw/7wroSF6ne8r804RkpZzqrJ/F6DO2/IYlQF/ULOZ/bhKyA==}
+
   '@typescript-eslint/eslint-plugin@8.32.1':
     resolution: {integrity: sha512-6u6Plg9nP/J1GRpe/vcjjabo6Uc5YQPAMxsgQyGC/I0RuukiG1wIe3+Vtg3IrSCVJDmqK3j8adrtzXSENRtFgg==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -5037,6 +5043,8 @@ snapshots:
 
   '@types/use-sync-external-store@0.0.6': {}
 
+  '@types/wicg-file-system-access@2023.10.6': {}
+
   '@typescript-eslint/eslint-plugin@8.32.1(@typescript-eslint/parser@8.32.1(eslint@9.27.0(jiti@2.4.2))(typescript@5.8.3))(eslint@9.27.0(jiti@2.4.2))(typescript@5.8.3)':
     dependencies:
       '@eslint-community/regexpp': 4.12.1
diff --git a/tsconfig.json b/tsconfig.json
index ce94041..2fbac8c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,7 @@
   "compilerOptions": {
     "target": "ESNext",
     "lib": ["DOM", "DOM.Iterable", "ESNext"],
-    "types": ["vitest/globals", "@testing-library/jest-dom"],
+    "types": ["@types/wicg-file-system-access", "vitest/globals", "@testing-library/jest-dom"],
     "module": "ESNext",
     "skipLibCheck": true,
     /* Bundler mode */