diff --git a/.eslintrc b/.eslintrc
index 78d24476c13..8c5e5ae2ebb 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -43,7 +43,7 @@
         "@typescript-eslint/no-var-requires": "off",
         "@typescript-eslint/prefer-for-of": "error",
         "@typescript-eslint/prefer-function-type": "off",
-        "@typescript-eslint/prefer-interface": "off",
+        "@typescript-eslint/prefer-interface": "error",
         "@typescript-eslint/prefer-namespace-keyword": "off",
         "semi": "off",
         "@typescript-eslint/semi": "error",
diff --git a/scripts/authors.ts b/scripts/authors.ts
index 0c88d1f4345..639b5e40086 100644
--- a/scripts/authors.ts
+++ b/scripts/authors.ts
@@ -2,15 +2,17 @@ import fs = require('fs');
 import path = require('path');
 import child_process = require("child_process");
 
-type Author = {
+interface Author {
     displayNames: string[];
     preferredName?: string;
     emails: string[];
 };
 
-type AuthorMap = { [s: string]: Author };
+interface AuthorMap {
+    [s: string]: Author
+};
 
-type Command = {
+interface Command {
     (...arg: string[]): void;
     description?: string;
 };