diff --git a/types/slate/index.d.ts b/types/slate/index.d.ts
index 7c9a41efa8..8f80ba4615 100644
--- a/types/slate/index.d.ts
+++ b/types/slate/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for slate 0.42
+// Type definitions for slate 0.43
 // Project: https://github.com/ianstormtaylor/slate
 // Definitions by: Andy Kent <https://github.com/andykent>
 //                 Jamie Talbot <https://github.com/majelbstoat>
@@ -1478,10 +1478,10 @@ export class SlateError extends Error {
     [key: string]: any;
 }
 
-export interface KeyUtils {
-    create(key: string): string;
-    setGenerator(func: () => any): void;
-    resetGenerator(): void;
+export namespace KeyUtils {
+    function create(key?: string): string;
+    function setGenerator(func: () => any): void;
+    function resetGenerator(): void;
 }
 
 export type useMemoization = () => void;
diff --git a/types/slate/slate-tests.ts b/types/slate/slate-tests.ts
index 8e843e2d3d..7eb81633bf 100644
--- a/types/slate/slate-tests.ts
+++ b/types/slate/slate-tests.ts
@@ -1,4 +1,4 @@
-import { Value, Data, BlockJSON, Document, Editor, Change } from "slate";
+import { Value, Data, BlockJSON, Document, Editor, Change, KeyUtils } from "slate";
 
 const data = Data.create({ foo: "bar " });
 const value = Value.create({ data });
@@ -58,3 +58,7 @@ editor.command("testCommand");
 editor.query("testQuery");
 editor.run("testCommand");
 editor.event("mouseDown", new Event("mouseDown"));
+
+KeyUtils.setGenerator(() => "Test");
+KeyUtils.create();
+KeyUtils.resetGenerator();