diff --git a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.test.ts b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.test.ts
index 23b584838f0..bb930de2ecd 100644
--- a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.test.ts
+++ b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.test.ts
@@ -6,7 +6,7 @@ describe('normalizeAccelerator', () => {
 		['Z', { v6: 'z', v5: 'Z' }],
 		['Alt+A', { v6: 'Alt-a', v5: 'Alt-A' }],
 		['Shift+A', { v6: 'Shift-a', v5: 'Shift-A' }],
-		['Shift+Up', { v6: 'Shift-Up', v5: 'Shift-Up' }],
+		['Shift+Up', { v6: 'Shift-ArrowUp', v5: 'Shift-Up' }],
 	])(
 		'should convert single-letter key names to lowercase for CM6, keep case unchanged for CM5 (%j)',
 		(original, expected) => {
diff --git a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.ts b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.ts
index a42ad3248d1..490664a30cc 100644
--- a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.ts
+++ b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/utils/normalizeAccelerator.ts
@@ -12,11 +12,17 @@ const normalizeAccelerator = (accelerator: string, editorVersion: CodeMirrorVers
 	const parts = command.split(/-(?!$)/);
 	let name = parts[parts.length - 1];
 
-	// In CodeMirror 6, an uppercase single-letter key name makes the editor
-	// require the shift key to activate the shortcut. If a key name like `Up`,
-	// however, `.toLowerCase` breaks the shortcut.
-	if (editorVersion === CodeMirrorVersion.CodeMirror6 && name.length === 1) {
-		name = name.toLowerCase();
+	if (editorVersion === CodeMirrorVersion.CodeMirror6) {
+		// In CodeMirror 6, an uppercase single-letter key name makes the editor
+		// require the shift key to activate the shortcut. If a key name like `Up`,
+		// however, `.toLowerCase` breaks the shortcut.
+		if (name.length === 1) {
+			name = name.toLowerCase();
+		}
+
+		if (['Up', 'Down', 'Left', 'Right'].includes(name)) {
+			name = `Arrow${name}`;
+		}
 	}
 
 	let alt, ctrl, shift, cmd;