diff --git a/src/window.py b/src/window.py
index 750432c..6da3077 100644
--- a/src/window.py
+++ b/src/window.py
@@ -1048,6 +1048,10 @@ class RosterWindow(Adw.ApplicationWindow):
         def on_environments_updated(dlg):
             # Reload projects to reflect changes
             self._load_projects()
+            # Refresh environment dropdowns in all open tabs for this project
+            for page, tab_widget in self.page_to_widget.items():
+                if tab_widget.project_id == project.id:
+                    tab_widget._populate_environment_dropdown()
 
         dialog.connect('environments-updated', on_environments_updated)
         dialog.present(self)