diff --git a/README.md b/README.md
index 9c3d8c06..aad45ab9 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@
 
 | **Feature**                             | **Description**                                                                                | **Status** |
 | --------------------------------------- | ---------------------------------------------------------------------------------------------- | ---------- |
-| **Multi-Format Support**                | Support EPUB, MOBI, KF8 (AZW3), FB2, CBZ, PDF (experimental)                                   | ✅         |
+| **Multi-Format Support**                | Support EPUB, MOBI, KF8 (AZW3), FB2, CBZ, TXT, PDF (experimental)                              | ✅         |
 | **Scroll/Page View Modes**              | Switch between scrolling or paginated reading modes.                                           | ✅         |
 | **Full-Text Search**                    | Search across the entire book to find relevant sections.                                       | ✅         |
 | **Annotations and Highlighting**        | Add highlights, bookmarks, and notes to enhance your reading experience.                       | ✅         |
diff --git a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
index 5aef0c85..366cc50d 100644
--- a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
+++ b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
@@ -77,7 +77,7 @@ const Annotator: React.FC<{ bookKey: string }> = ({ bookKey }) => {
   const dictPopupHeight = Math.min(300, maxHeight);
   const transPopupWidth = Math.min(480, maxWidth);
   const transPopupHeight = Math.min(360, maxHeight);
-  const annotPopupWidth = useResponsiveSize(300);
+  const annotPopupWidth = Math.min(useResponsiveSize(300), maxWidth);
   const annotPopupHeight = useResponsiveSize(44);
   const androidSelectionHandlerHeight = 0;