diff --git a/.github/workflows/typescript-tests.yml b/.github/workflows/typescript-tests.yml
index 90f76645..5593f52a 100644
--- a/.github/workflows/typescript-tests.yml
+++ b/.github/workflows/typescript-tests.yml
@@ -29,7 +29,7 @@ jobs:
       - run: npm run lint
 
   type-check:
-    name: Type checking on optuna-dashboard
+    name: Type checking on optuna-dashboard & standalone_app
     runs-on: ubuntu-latest
 
     steps:
@@ -44,12 +44,24 @@ jobs:
       - name: Setup tslib
         run: make tslib
       
-      - name: Type Check
+      - name: Type Check optuna_dashboard
         working-directory: optuna_dashboard
         run: |
           npm install
           npm run type-check
 
+      - name: Build rustlib for standalone_app
+        working-directory: rustlib
+        run: |
+          curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+          wasm-pack build --target web
+
+      - name: Type Check standalone_app
+        working-directory: standalone_app
+        run: |
+          npm install
+          npm run type-check
+
   check-package-lock-json:
     name: Check package-lock.json
     runs-on: ubuntu-latest
diff --git a/standalone_app/package.json b/standalone_app/package.json
index a9f26a7f..935efedd 100644
--- a/standalone_app/package.json
+++ b/standalone_app/package.json
@@ -5,7 +5,8 @@
   "description": "",
   "scripts": {
     "watch": "vite",
-    "build:vscode": "webpack"
+    "build:vscode": "webpack",
+    "type-check": "tsc --noEmit"
   },
   "devDependencies": {
     "@optuna/types": "../tslib/types",