diff --git a/src/runtime/types/utils.ts b/src/runtime/types/utils.ts
index 9c31526d..4590b4de 100644
--- a/src/runtime/types/utils.ts
+++ b/src/runtime/types/utils.ts
@@ -1,6 +1,14 @@
-export type DeepPartial<T> = Partial<{
-  [P in keyof T]: DeepPartial<T[P]> | { [key: string]: string | object }
-}>
+export interface TightMap<O = any> {
+  [key: string]: TightMap | O
+}
+
+export type DeepPartial<T, O = any> = {
+  [P in keyof T]?: T[P] extends object
+    ? DeepPartial<T[P], O>
+    : T[P];
+} & {
+  [key: string]: O | TightMap<O>
+}
 
 export type DynamicSlots<T extends { slot?: string }, SlotProps, Slot = T['slot']> =
   Record<string, SlotProps> & (Slot extends string ? Record<Slot, SlotProps> : Record<string, never>)
diff --git a/src/templates.ts b/src/templates.ts
index a7d5a7e3..92a73d06 100644
--- a/src/templates.ts
+++ b/src/templates.ts
@@ -101,7 +101,7 @@ type AppConfigUI = {
     gray?: 'slate' | 'cool' | 'zinc' | 'neutral' | 'stone'
   }
   icons?: Partial<typeof icons>
-} & DeepPartial<typeof ui>
+} & DeepPartial<typeof ui, string>
 
 declare module 'nuxt/schema' {
   interface AppConfigInput {