diff --git a/crates/index/src/main.rs b/crates/index/src/main.rs
index de252713..265c9774 100644
--- a/crates/index/src/main.rs
+++ b/crates/index/src/main.rs
@@ -20,7 +20,7 @@ use rip::writer::{global_multi_progress, IndicatifWriter};
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Args {
-    /// Base URL of the Python Package Index (default https://pypi.org/simple). This should point
+    /// Base URL of the Python Package Index (default <https://pypi.org/simple>). This should point
     /// to a repository compliant with PEP 503 (the simple repository API).
     #[clap(default_value = "https://pypi.org/simple/", long)]
     index_url: Url,