diff --git a/src/main.rs b/src/main.rs
index 47f72f6..931b562 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -142,7 +142,7 @@ impl Handler {
         let handler_msg_clone = handler.clone();
         greeter.connect_show_message(move |_, msg, _| {
             handler_msg_clone
-                .borrow_mut()
+                .borrow()
                 .msg_label
                 .as_ref()
                 .expect("no msg label")
@@ -151,7 +151,7 @@ impl Handler {
         let handler_prmpt_clone = handler.clone();
         greeter.connect_show_prompt(move |_, msg, _| {
             handler_prmpt_clone
-                .borrow_mut()
+                .borrow()
                 .pmpt_label
                 .as_ref()
                 .expect("no msg label")