diff --git a/frontend/src/app.rs b/frontend/src/app.rs
index 5c4580f..95da19b 100644
--- a/frontend/src/app.rs
+++ b/frontend/src/app.rs
@@ -996,8 +996,61 @@ pub fn App() -> Html {
                                             web_sys::window().unwrap().alert_with_message("Cannot move event - original event missing calendar path").unwrap();
                                         }
                                     } else {
-                                        // Calendar hasn't changed - normal update
-                                        match calendar_service.update_event(
+                                        // Calendar hasn't changed - check if we should use series endpoint
+                                        let use_series_endpoint = updated_data.edit_scope.is_some() && original_event.rrule.is_some();
+                                        
+                                        if use_series_endpoint {
+                                            // Use series endpoint for recurring event modal edits
+                                            let update_scope = match updated_data.edit_scope.as_ref().unwrap() {
+                                                EditAction::EditThis => "this_only",
+                                                EditAction::EditFuture => "this_and_future", 
+                                                EditAction::EditAll => "all_in_series",
+                                            };
+                                            
+                                            // For single occurrence edits, we need the occurrence date
+                                            let occurrence_date = if update_scope == "this_only" || update_scope == "this_and_future" {
+                                                // Use the original event's start date as the occurrence date
+                                                Some(original_event.dtstart.format("%Y-%m-%d").to_string())
+                                            } else {
+                                                None
+                                            };
+                                            
+                                            match calendar_service.update_series(
+                                                &token,
+                                                &password,
+                                                original_event.uid,
+                                                updated_data.title,
+                                                updated_data.description,
+                                                start_date,
+                                                start_time,
+                                                end_date,
+                                                end_time,
+                                                updated_data.location,
+                                                updated_data.all_day,
+                                                status_str,
+                                                class_str,
+                                                updated_data.priority,
+                                                updated_data.organizer,
+                                                updated_data.attendees,
+                                                updated_data.categories,
+                                                reminder_str,
+                                                recurrence_str,
+                                                updated_data.selected_calendar,
+                                                update_scope.to_string(),
+                                                occurrence_date,
+                                            ).await {
+                                                Ok(_) => {
+                                                    web_sys::console::log_1(&"Series updated successfully".into());
+                                                    web_sys::window().unwrap().location().reload().unwrap();
+                                                }
+                                                Err(err) => {
+                                                    web_sys::console::error_1(&format!("Failed to update series: {}", err).into());
+                                                    web_sys::window().unwrap().alert_with_message(&format!("Failed to update series: {}", err)).unwrap();
+                                                }
+                                            }
+                                        } else {
+                                            // Use regular event endpoint for non-recurring events or legacy updates
+                                            match calendar_service.update_event(
                                             &token,
                                             &password,
                                             original_event.uid,
@@ -1033,6 +1086,7 @@ pub fn App() -> Html {
                                                 web_sys::window().unwrap().alert_with_message(&format!("Failed to update event: {}", err)).unwrap();
                                             }
                                         }
+                                        }
                                     }
                                 });
                             }