diff --git a/tsconfig.json b/tsconfig.json
index 91abac7..4513e4f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,4 +1,5 @@
 {
+  "extends": "./node_modules/gts/tsconfig-google.json",
   "compilerOptions": {
     "rootDir": "./src",
     "outDir": "dist",
@@ -10,7 +11,9 @@
     "noUnusedLocals": true,
     "noImplicitAny": true,
     "allowJs": true,
-    "resolveJsonModule": true
+    "resolveJsonModule": true,
+    "declaration": true,
+    "sourceMap": true
   },
   "include": ["./src/**/*.ts", "./test/**/*.ts"]
 }