diff --git a/app/javascript/mastodon/store/middlewares/errors.ts b/app/javascript/mastodon/store/middlewares/errors.ts
index 4e720bfed4e..9f28f5ff53f 100644
--- a/app/javascript/mastodon/store/middlewares/errors.ts
+++ b/app/javascript/mastodon/store/middlewares/errors.ts
@@ -5,7 +5,7 @@ import { showAlertForError } from '../../actions/alerts';
 
 const defaultFailSuffix = 'FAIL';
 
-export const errorsMiddleware: Middleware<Record<string, never>, RootState> =
+export const errorsMiddleware: Middleware<unknown, RootState> =
   ({ dispatch }) =>
   (next) =>
   (action: AnyAction & { skipAlert?: boolean; skipNotFound?: boolean }) => {
diff --git a/app/javascript/mastodon/store/middlewares/loading_bar.ts b/app/javascript/mastodon/store/middlewares/loading_bar.ts
index 379b3758a12..5fe8000731a 100644
--- a/app/javascript/mastodon/store/middlewares/loading_bar.ts
+++ b/app/javascript/mastodon/store/middlewares/loading_bar.ts
@@ -15,7 +15,7 @@ const defaultTypeSuffixes: Config['promiseTypeSuffixes'] = [
 
 export const loadingBarMiddleware = (
   config: Config = {},
-): Middleware<Record<string, never>, RootState> => {
+): Middleware<unknown, RootState> => {
   const promiseTypeSuffixes = config.promiseTypeSuffixes ?? defaultTypeSuffixes;
 
   return ({ dispatch }) =>
diff --git a/app/javascript/mastodon/store/middlewares/sounds.ts b/app/javascript/mastodon/store/middlewares/sounds.ts
index 092f403f5fb..09ade7d7532 100644
--- a/app/javascript/mastodon/store/middlewares/sounds.ts
+++ b/app/javascript/mastodon/store/middlewares/sounds.ts
@@ -34,10 +34,7 @@ const play = (audio: HTMLAudioElement) => {
   void audio.play();
 };
 
-export const soundsMiddleware = (): Middleware<
-  Record<string, never>,
-  RootState
-> => {
+export const soundsMiddleware = (): Middleware<unknown, RootState> => {
   const soundCache: Record<string, HTMLAudioElement> = {};
 
   void ready(() => {
diff --git a/app/javascript/mastodon/store/typed_functions.ts b/app/javascript/mastodon/store/typed_functions.ts
index d05a256baba..f1e71385a88 100644
--- a/app/javascript/mastodon/store/typed_functions.ts
+++ b/app/javascript/mastodon/store/typed_functions.ts
@@ -12,5 +12,4 @@ export const createAppAsyncThunk = createAsyncThunk.withTypes<{
   state: RootState;
   dispatch: AppDispatch;
   rejectValue: string;
-  extra: { s: string; n: number };
 }>();