diff --git a/update_copyright/project.py b/update_copyright/project.py
index 6a4e3a8..79f7fea 100644
--- a/update_copyright/project.py
+++ b/update_copyright/project.py
@@ -181,6 +181,11 @@ class Project (object):
             authors=authors, text=self._copyright, info=self._info(),
             prefix=('/* ', ' * ', ' */'), width=self._width,
             tag=self._copyright_tag)
+        new_contents = _utils.update_copyright(
+            contents=new_contents, years=years,
+            authors=authors, text=self._copyright, info=self._info(),
+            prefix=('!! ', '!! ', ''), width=self._width,
+            tag=self._copyright_tag)
         _utils.set_contents(
             filename=filename, contents=new_contents,
             original_contents=contents, unicode=True, encoding=self._encoding,