diff --git a/.gitignore b/.gitignore
index 7069747..00cefab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -138,4 +138,6 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
+# Don't uncomment this! This file contains the Gandi authentication
+# token. That must be kept secret!
 GandiAuthenticationHeader.py