diff --git a/backend/tsconfig.json b/backend/tsconfig.json
index ae6c30e..2f97a98 100644
--- a/backend/tsconfig.json
+++ b/backend/tsconfig.json
@@ -2,7 +2,7 @@
   "compilerOptions": {
     "target": "ES2020",
     "module": "commonjs",
-    "lib": ["ES2020"],
+    "lib": ["ES2020", "DOM"],
     "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,