diff --git a/packages/slate-history/src/with-history.ts b/packages/slate-history/src/with-history.ts
index 8663b07d1..734547252 100644
--- a/packages/slate-history/src/with-history.ts
+++ b/packages/slate-history/src/with-history.ts
@@ -7,8 +7,8 @@ import { HistoryEditor } from './history-editor'
  * editor as operations are applied to it, using undo and redo stacks.
  */
 
-export const withHistory = (editor: Editor): HistoryEditor => {
-  const e = editor as HistoryEditor
+export const withHistory = <T extends Editor>(editor: T) => {
+  const e = editor as T & HistoryEditor
   const { apply } = e
   e.history = { undos: [], redos: [] }
 
diff --git a/packages/slate-react/src/plugin/with-react.ts b/packages/slate-react/src/plugin/with-react.ts
index db9218df1..1441aa64b 100644
--- a/packages/slate-react/src/plugin/with-react.ts
+++ b/packages/slate-react/src/plugin/with-react.ts
@@ -9,8 +9,8 @@ import { EDITOR_TO_ON_CHANGE, NODE_TO_KEY } from '../utils/weak-maps'
  * `withReact` adds React and DOM specific behaviors to the editor.
  */
 
-export const withReact = (editor: Editor): ReactEditor => {
-  const e = editor as ReactEditor
+export const withReact = <T extends Editor>(editor: T) => {
+  const e = editor as T & ReactEditor
   const { apply, onChange } = e
 
   e.apply = (op: Operation) => {