diff --git a/lib/loader/index.d.ts b/lib/loader/index.d.ts
index a2a05a4a..8d898cbd 100644
--- a/lib/loader/index.d.ts
+++ b/lib/loader/index.d.ts
@@ -1,8 +1,7 @@
 import "@types/webassembly-js-api";
 
 /** WebAssembly imports with two levels of nesting. */
-interface ImportsObject {
-  [key: string]: {},
+interface ImportsObject extends Record<string, any> {
   env?: {
     memory?: WebAssembly.Memory,
     table?: WebAssembly.Table,