diff --git a/aider/args_formatter.py b/aider/args_formatter.py
index f2f1df195..f97cb433d 100644
--- a/aider/args_formatter.py
+++ b/aider/args_formatter.py
@@ -91,7 +91,7 @@ class YamlHelpFormatter(argparse.HelpFormatter):
     def _format_text(self, text):
         return """
 ##########################################################
-# Sample .aider.conf.yaml
+# Sample .aider.conf.yml
 # This file lists *all* the valid configuration entries.
 # Place in your home dir, or at the root of your git repo.
 ##########################################################
diff --git a/aider/website/assets/sample.aider.conf.yml b/aider/website/assets/sample.aider.conf.yml
index 24d525b32..654430e3b 100644
--- a/aider/website/assets/sample.aider.conf.yml
+++ b/aider/website/assets/sample.aider.conf.yml
@@ -1,5 +1,5 @@
 ##########################################################
-# Sample .aider.conf.yaml
+# Sample .aider.conf.yml
 # This file lists *all* the valid configuration entries.
 # Place in your home dir, or at the root of your git repo.
 ##########################################################
diff --git a/aider/website/docs/config/aider_conf.md b/aider/website/docs/config/aider_conf.md
index 3c7145560..621d8a9e9 100644
--- a/aider/website/docs/config/aider_conf.md
+++ b/aider/website/docs/config/aider_conf.md
@@ -38,7 +38,7 @@ cog.outl("```")
 ]]]-->
 ```
 ##########################################################
-# Sample .aider.conf.yaml
+# Sample .aider.conf.yml
 # This file lists *all* the valid configuration entries.
 # Place in your home dir, or at the root of your git repo.
 ##########################################################