diff --git a/functions/.eslintrc.js b/functions/.eslintrc.js
new file mode 100644
index 0000000..973030b
--- /dev/null
+++ b/functions/.eslintrc.js
@@ -0,0 +1,14 @@
+module.exports = {
+  root: true,
+  env: {
+    es6: true,
+    node: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "google",
+  ],
+  rules: {
+    quotes: ["error", "double"],
+  },
+};