diff --git a/src/components/hero-404/index.tsx b/src/components/hero-404/index.tsx
index 9f06b2f..0300715 100644
--- a/src/components/hero-404/index.tsx
+++ b/src/components/hero-404/index.tsx
@@ -218,8 +218,10 @@ void main() {
         e.preventDefault();
       }
 
-      const touchX = e.touches[0].clientX;
-      const touchY = e.touches[0].clientY;
+      const touch = e.touches[0];
+      if (!touch) return;
+      const touchX = touch.clientX;
+      const touchY = touch.clientY;
 
       const x = (touchX / window.innerWidth) * 2 - 1;
       const y = (touchY / window.innerHeight) * 2 - 1;
diff --git a/src/components/hero/index.tsx b/src/components/hero/index.tsx
index 0d75ee3..c114e2d 100644
--- a/src/components/hero/index.tsx
+++ b/src/components/hero/index.tsx
@@ -227,8 +227,10 @@ void main() {
         e.preventDefault();
       }
 
-      const touchX = e.touches[0].clientX;
-      const touchY = e.touches[0].clientY;
+      const touch = e.touches[0];
+      if (!touch) return;
+      const touchX = touch.clientX;
+      const touchY = touch.clientY;
 
       const x = (touchX / window.innerWidth) * 2 - 1;
       const y = (touchY / window.innerHeight) * 2 - 1;
diff --git a/tsconfig.json b/tsconfig.json
index 93359ad..230f450 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,6 +13,7 @@
     "moduleResolution": "bundler",
     "noUnusedLocals": true,
     "noUnusedParameters": true,
+    "noUncheckedIndexedAccess": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
     "jsx": "react-jsx",