diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 16ea8f4..c598e1f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,7 +5,7 @@ this repository containing the new advisory:
 
 ### Required Steps
 
-1. Create a file named `RUSTSEC-0000-0000.toml` in the `crates/<yourcratename>`
+1. Create a file named `RUSTSEC-0000-0000.md` in the `crates/<yourcratename>`
    subdirectory of this repository (you may need to create it if it doesn't exist)
 2. Copy and paste the [TOML advisory template] from the README.md file in this repo.
    Delete the comments and additional whitespace, and fill it out with the