diff --git a/package.json b/package.json
index 7db77592a..407922a96 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "preview": "vite preview",
     "test": "jest --verbose ./src/__tests__",
     "cypresstest": "cypress run",
-    "lint": "eslint .",
+    "lint": "eslint \"src/**/*.{js,jsx,ts,tsx}\"",
     "lint-fix": "eslint ./ --fix",
     "format": "prettier --write .",
     "format-all": "prettier --write .",
diff --git a/src/react-app-env.t.ts b/src/react-app-env.t.ts
new file mode 100644
index 000000000..7073a6082
--- /dev/null
+++ b/src/react-app-env.t.ts
@@ -0,0 +1,2 @@
+// <reference types="react-scripts" />
+declare module "*.mp3";