diff --git a/docs/configuration.md b/docs/configuration.md
index 0dcd821..521daff 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -191,3 +191,5 @@ Option | Description | Possible Values | Default | App-Specific
 `secure_input_notification` | Enable/Disable the Secure Input notification on macOS | `true`/`false` | `true` | No
 `show_icon` | Show/Hide the icon in the status bar on macOS and Windows | `true`/`false` | `true` | No
 `show_notifications` | Show/Hide the notifications| `true`/`false` | `true` | No
+`fast_inject` |  Use a faster injection mechanism (Linux only). It uses XSendEvent API rather than XTestFakeKeyEvent API, which is faster but incompatible with some applications.| `true`/`false` | `true`| Yes
+