diff --git a/packages/mui-lab/src/Timeline/Timeline.tsx b/packages/mui-lab/src/Timeline/Timeline.tsx
index 2df1eb6b2e7829..f5c7689f857c0d 100644
--- a/packages/mui-lab/src/Timeline/Timeline.tsx
+++ b/packages/mui-lab/src/Timeline/Timeline.tsx
@@ -21,8 +21,8 @@ const useUtilityClasses = (ownerState: OwnerState) => {
   return composeClasses(slots, getTimelineUtilityClass, classes);
 };
 
-const TimelineRoot = styled('ul' as const, {
-  name: 'MuiTimeline' as const,
+const TimelineRoot = styled('ul', {
+  name: 'MuiTimeline',
   slot: 'Root',
   overridesResolver: (props, styles) => {
     const { ownerState } = props;
diff --git a/packages/mui-lab/src/Timeline/Timeline.types.ts b/packages/mui-lab/src/Timeline/Timeline.types.ts
index 01e9cbf6df0176..22207ea2316e96 100644
--- a/packages/mui-lab/src/Timeline/Timeline.types.ts
+++ b/packages/mui-lab/src/Timeline/Timeline.types.ts
@@ -4,7 +4,7 @@ import { Theme } from '@mui/material/styles';
 import { SxProps } from '@mui/system';
 import { TimelineClasses } from './timelineClasses';
 
-export interface TimelineProps extends StandardProps<React.HTMLAttributes<HTMLUListElement>> {
+export interface TimelineProps extends StandardProps<React.ComponentProps<'ul'>> {
   /**
    * The position where the TimelineContent should appear relative to the time axis.
    * @default 'right'