diff --git a/protypo/src/lib.rs b/protypo/src/lib.rs
index e1db08f..5af6fd1 100644
--- a/protypo/src/lib.rs
+++ b/protypo/src/lib.rs
@@ -253,7 +253,7 @@ impl Generator {
         let rrgen = RRgen::with_templates(templates).map_err(|err| {
             std::io::Error::new(
                 std::io::ErrorKind::Other,
-                format!("Could not initialize rrgen, due to error: {:?}", err),
+                format!("Could not initialize rrgen, due to error: {err:?}"),
             )
         })?;