diff --git a/src/Item.tsx b/src/Item.tsx
index cfd18bd..c09bdc9 100644
--- a/src/Item.tsx
+++ b/src/Item.tsx
@@ -82,9 +82,13 @@ function InternalItem<ItemType>(
     };
   }
 
-  const overflowProps: React.HTMLAttributes<any> = {};
+  const overflowProps: Omit<React.HTMLAttributes<any>, 'inert'> & {
+    inert?: boolean | '';
+  } = {};
   if (mergedHidden) {
     overflowProps['aria-hidden'] = true;
+    // React <= 18 only serializes unknown boolean attributes when passed as strings.
+    overflowProps.inert = Number.parseInt(React.version, 10) >= 19 ? true : '';
   }
 
   let itemNode = (
diff --git a/tests/__snapshots__/ssr.spec.tsx.snap b/tests/__snapshots__/ssr.spec.tsx.snap
index e5415e9..00b42a6 100644
--- a/tests/__snapshots__/ssr.spec.tsx.snap
+++ b/tests/__snapshots__/ssr.spec.tsx.snap
@@ -19,6 +19,7 @@ exports[`Overflow.SSR basic 1`] = `
   <div
     aria-hidden="true"
     class="rc-overflow-item rc-overflow-item-rest"
+    inert=""
     style="opacity:0;height:0;overflow-y:hidden;order:9007199254740991;pointer-events:none;position:absolute"
   >
     + 0 ...
diff --git a/tests/responsive.spec.tsx b/tests/responsive.spec.tsx
index f7d537c..b23aa33 100644
--- a/tests/responsive.spec.tsx
+++ b/tests/responsive.spec.tsx
@@ -47,6 +47,8 @@ describe('Overflow.Responsive', () => {
     expect(
       wrapper.findItems().find('div').last().prop('aria-hidden'),
     ).toBeTruthy();
+    expect(wrapper.findItems().last().prop('inert')).toBe('');
+    expect(wrapper.findItems().at(0).prop('inert')).toBeNull();
   });
 
   it('only one', async () => {