diff --git a/debian/changelog b/debian/changelog
index 76754e5..0a91a22 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+docparser (1.0.25) unstable; urgency=medium
+
+  * add ET file format support
+
+ -- Zhang Sheng <zhangsheng@uniontech.com>  Mon, 01 Dec 2025 09:11:51 +0800
+
 docparser (1.0.24) unstable; urgency=medium
 
   * improve file conversion fallback logic for truncated files
diff --git a/src/docparser.cpp b/src/docparser.cpp
index edeec88..7233075 100644
--- a/src/docparser.cpp
+++ b/src/docparser.cpp
@@ -220,6 +220,7 @@ static const std::unordered_map<std::string, FileCreator> createExtensionMap()
         { "odp", createOdf },
         { "xls", createExcel },
         { "xlsx", createExcel },
+        { "et", createExcel },
         { "xlsb", createXlsb },
         { "ppt", createPpt },
         { "pps", createPpt },