diff --git a/.gitignore b/.gitignore
index dec8b64..bcbaefd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,6 @@ next-env.d.ts
 coverage
 
 # build output
-dist
\ No newline at end of file
+dist
+
+CLAUDE.md
\ No newline at end of file
diff --git a/app/tsconfig.json b/app/tsconfig.json
index 48d6d82..9c24b3c 100644
--- a/app/tsconfig.json
+++ b/app/tsconfig.json
@@ -6,7 +6,7 @@
       "esnext"
     ],
     "allowJs": true,
-    "target": "ES6",
+    "target": "ES2020",
     "skipLibCheck": true,
     "strict": true,
     "noEmit": true,