diff --git a/cyclonedx_py/_internal/utils/mimetypes.py b/cyclonedx_py/_internal/utils/mimetypes.py
index 0d447c42..489ba008 100644
--- a/cyclonedx_py/_internal/utils/mimetypes.py
+++ b/cyclonedx_py/_internal/utils/mimetypes.py
@@ -29,12 +29,12 @@
     '.md': 'text/markdown',
     '.txt': 'text/plain',
     '.rst': 'text/prs.fallenstein.rst',
-    '.rtf': 'application/rtf',
+    '.rtf': 'application/rtf',  # our scope is text, yes, but RTF is binary - so we should base64 encode it ...
     '.xml': 'text/xml',  # not `application/xml` -- our scope is text!
+    # add more mime types above this line. pull-requests welcome!
     # license-specific files
     '.license': _MIME_TEXT_PLAIN,
     '.licence': _MIME_TEXT_PLAIN,
-    # add more mime types. pull-requests welcome!
 }
 
 _LICENSE_FNAME_BASE = ('licence', 'license')