diff --git a/src/core/server/ui_settings/settings/theme.ts b/src/core/server/ui_settings/settings/theme.ts
index 5079375fb37a..75c1431f2d74 100644
--- a/src/core/server/ui_settings/settings/theme.ts
+++ b/src/core/server/ui_settings/settings/theme.ts
@@ -57,6 +57,7 @@ export const getThemeSettings = (): Record<string, UiSettingsParams> => {
       }),
       requiresPageReload: true,
       schema: schema.oneOf([schema.literal('v7'), schema.literal('v8 (beta)')]),
+      readonly: true,
     },
   };
 };