diff --git a/index.md b/index.md
index 9212647..526b2fc 100644
--- a/index.md
+++ b/index.md
@@ -12,6 +12,7 @@ Configure sudoers environment.
 - [Default Variables](#default-variables)
   - [sudo_aliases](#sudo_aliases)
   - [sudo_env_keep](#sudo_env_keep)
+  - [sudo_logfile](#sudo_logfile)
   - [sudo_misc_settings](#sudo_misc_settings)
   - [sudo_packages](#sudo_packages)
   - [sudo_secure_path](#sudo_secure_path)
@@ -83,6 +84,14 @@ sudo_env_keep:
   - XAUTHORITY
 ```
 
+### sudo_logfile
+
+#### Default value
+
+```YAML
+sudo_logfile: /var/log/sudo.log
+```
+
 ### sudo_misc_settings
 
 #### Default value