diff --git a/recipes2html.py b/recipes2html.py
index 69770cd..7949d80 100644
--- a/recipes2html.py
+++ b/recipes2html.py
@@ -2,12 +2,31 @@ from os import path, walk
 from recipe import Recipe
 from sys import argv
 
+
+def write_file_safely(filepath, content):
+    if path.exists(filepath):
+        response = input(f"File '{filepath}' exists. Overwrite? (y/N): ")
+
+        if not response or not response.lower().startswith("y"):
+            print(f"Skipping '{filepath}'")
+            return
+
+    with open(filepath, 'w') as file:
+        file.write(content)
+
+
 if len(argv) < 2:
-    print(f"Usage: {argv[0]} <recipe directory>")
+    print(f"Usage: {argv[0]} <recipe directory> [index_header.html]")
     exit(1)
 
 recipe_dir = argv[1]
 
+if len(argv) > 2:
+    with open(argv[2], 'r') as index_header_file:
+        index_header_html = index_header_file.read()
+else:
+    index_header_html = ""
+
 recipe_names = {}
 for dirpath, dirnames, filenames in walk(recipe_dir):
     for filename in filenames:
@@ -17,8 +36,7 @@ for dirpath, dirnames, filenames in walk(recipe_dir):
             html = recipe.to_html()
             html_filepath = path.join(dirpath, f"{filename.rsplit('.', maxsplit=1)[0]}.html")
 
-            with open(html_filepath, 'w') as html_file:
-                html_file.write(html)
+            write_file_safely(html_filepath, html)
 
             recipe_names[recipe.name] = path.relpath(html_filepath, start=recipe_dir)
 
@@ -32,20 +50,19 @@ index_html = f"""<!DOCTYPE html>
 <body>
 
 <header>
-  <h1>Recipes</h1>
-  <p>These are recipes that I'd like to share.</p>
+{index_header_html}
 </header>
 
-<main>
+<section>
+  <h2>Recipes</h2>
   <ul>
 {"\n".join([f"    <li><a href='./{filepath}'>{name}</a></li>" for name, filepath in recipe_names.items()])}
   </ul>
-</main>
+</section>
 
 </body>
 </html>
 """
 
-with open(path.join(recipe_dir, "index.html"), 'w') as index_file:
-    index_file.write(index_html)
+write_file_safely(path.join(recipe_dir, "index.html"), index_html)
 
