diff --git a/src/sidebar/components/Annotation/ThumbnailDescriptionInput.tsx b/src/sidebar/components/Annotation/ThumbnailDescriptionInput.tsx
index a98e89ce447..b843da1015d 100644
--- a/src/sidebar/components/Annotation/ThumbnailDescriptionInput.tsx
+++ b/src/sidebar/components/Annotation/ThumbnailDescriptionInput.tsx
@@ -30,7 +30,7 @@ export default function ThumbnailDescriptionInput({
           value={description}
           onInput={e => onEdit((e.target as HTMLInputElement).value)}
           // Maximum length for `target.description` field supported by the API.
-          maxlength={250}
+          maxlength={5000}
           classes="flex-1"
         />
         <IconButton