diff --git a/examples/document.rs b/examples/document.rs
index 8b096f3..5986896 100644
--- a/examples/document.rs
+++ b/examples/document.rs
@@ -31,7 +31,7 @@ fn handle_request(_request: Request) -> BoxFuture<'static, Result<Response>> {
             .add_blank_line()
             .add_heading(H2, "Manually")
             .add_blank_line()
-            .add_preformatted_with_alt("alt", r#"northstar = "0.3.0" # check crates.io for the latest version"#)
+            .add_preformatted_with_alt("toml", r#"northstar = "0.3.0" # check crates.io for the latest version"#)
             .add_blank_line()
             .add_heading(H2, "Automatically")
             .add_blank_line()