diff --git a/screens/repo_view_screen.py b/screens/repo_view_screen.py
index a9a81f4..9aecfa7 100644
--- a/screens/repo_view_screen.py
+++ b/screens/repo_view_screen.py
@@ -173,7 +173,7 @@ class RepoViewScreen(Screen):
         files.add_rows(rows)
         
         if not found_readme:
-            readme.update("This repository has no `README.md` file.")
+            self.app.call_from_thread(readme.update, "This repository has no `README.md` file.")
         
         loading.display = False
         files.display = True