diff --git a/typings/_/index.d.ts b/typings/_/index.d.ts
index 3f7099838..372a484e1 100644
--- a/typings/_/index.d.ts
+++ b/typings/_/index.d.ts
@@ -66,7 +66,7 @@ declare global {
    * @return Value or nothing
    */
   function __md_get<T>(
-    key: string, storage?: Storage, base?: string
+    key: string, storage?: Storage, base?: URL
   ): T | null
 
   /**
@@ -83,7 +83,7 @@ declare global {
    * @param base - Base URL (default: current base)
    */
   function __md_set<T>(
-    key: string, value: T, storage?: Storage, base?: string
+    key: string, value: T, storage?: Storage, base?: URL
   ): void
 }