diff --git a/docling_core/types/doc/document.py b/docling_core/types/doc/document.py
index 8a986ad1..2ce0f3af 100644
--- a/docling_core/types/doc/document.py
+++ b/docling_core/types/doc/document.py
@@ -1844,7 +1844,7 @@ def save_as_markdown(
             page_no=page_no,
         )
 
-        with open(filename, "w") as fw:
+        with open(filename, "w", encoding="utf-8") as fw:
             fw.write(md_out)
 
     def export_to_markdown(  # noqa: C901
@@ -2081,7 +2081,7 @@ def save_as_html(
             html_head=html_head,
         )
 
-        with open(filename, "w") as fw:
+        with open(filename, "w", encoding="utf-8") as fw:
             fw.write(html_out)
 
     def _get_output_paths(