diff --git a/package.json b/package.json
index 266c2b7..5a43464 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.51.4",
+  "version": "1.51.5",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {
diff --git a/src/components/WeeklyView.tsx b/src/components/WeeklyView.tsx
index a8c8294..2e8cf4a 100644
--- a/src/components/WeeklyView.tsx
+++ b/src/components/WeeklyView.tsx
@@ -177,7 +177,7 @@ interface SomedayList {
 }
 
 // Time grid configuration options
-type CellDuration = 15 | 30 | 60 | 120;
+type CellDuration = 15 | 20 | 30 | 60;
 const DEFAULT_SOMEDAY_SLOT_COUNT = 5;
 
 const getSomedaySlotCount = (tasks: Task[]) => {
@@ -11032,9 +11032,9 @@ function SettingsSidebar({
                                                 style={{ width: "100%", padding: "8px", border: "1px solid #ddd", borderRadius: "4px" }}
                                             >
                                                 <option value={15}>15 min</option>
+                                                <option value={20}>20 min</option>
                                                 <option value={30}>30 min</option>
                                                 <option value={60}>1 hour</option>
-                                                <option value={120}>2 hours</option>
                                             </select>
                                         </div>