diff --git a/pdf_oralia/join.py b/pdf_oralia/join.py
index 5cf2688..37c5aea 100644
--- a/pdf_oralia/join.py
+++ b/pdf_oralia/join.py
@@ -8,7 +8,7 @@ def join_excel(src, dest, file_pattern):
     filenames = list_files(src, file_pattern)
     dfs = extract_dfs(filenames)
     joined_df = pd.concat(dfs)
-    joined_df.to_excel(dest)
+    joined_df.to_excel(dest, index=False)
 
 
 def list_files(src, file_glob):