diff --git a/src/runtime/types/v4.ts b/src/runtime/types/v4.ts
index b3ce7c31..45bb999c 100644
--- a/src/runtime/types/v4.ts
+++ b/src/runtime/types/v4.ts
@@ -23,7 +23,7 @@ export interface PaginationByOffset {
 
 export interface Strapi4RequestParams<T> {
   fields?: Array<StrapiRequestParamField<T>>
-  populate?: '*' | StrapiRequestParamPopulate<T> | Array<StrapiRequestParamPopulate<T>>
+  populate?: Strapi4RequestPopulateParam<T>
   sort?: StrapiRequestParamSort<T> | Array<StrapiRequestParamSort<T>>
   pagination?: PaginationByOffset | PaginationByPage
   filters?: Record<string, unknown>
@@ -31,6 +31,21 @@ export interface Strapi4RequestParams<T> {
   locale?: StrapiLocale
 }
 
+export type Strapi4RequestPopulateParams<T> = Pick<Strapi4RequestParams<T>, 'fields' | 'sort' | 'populate' | 'filters'>
+
+// Unified type for Strapi populate, combining both string paths and nested objects.
+export type Strapi4RequestPopulateParam<T> =
+  | '*' // Populate all relations.
+  | { [K in keyof T]?: // Nested object population.
+    T[K] extends object
+      ? T[K] extends Array<infer I>
+        ? Strapi4RequestPopulateParam<I> | Strapi4RequestPopulateParams<I>
+        : Strapi4RequestPopulateParam<T[K]> | Strapi4RequestPopulateParams<T[K]>
+      : never
+  }
+  | StrapiRequestParamPopulate<T> // String paths like "field.subfield".
+  | Array<StrapiRequestParamPopulate<T>> // Array of string paths.
+
 export interface Strapi4ResponseData<T> {
   id: number
   attributes: T
diff --git a/src/runtime/types/v5.ts b/src/runtime/types/v5.ts
index 8a8c651e..9d9a0bf4 100644
--- a/src/runtime/types/v5.ts
+++ b/src/runtime/types/v5.ts
@@ -11,7 +11,7 @@ export interface Strapi5Error {
 
 export interface Strapi5RequestParams<T> {
   fields?: Array<StrapiRequestParamField<T>>
-  populate?: '*' | StrapiRequestParamPopulate<T> | Array<StrapiRequestParamPopulate<T>>
+  populate?: Strapi5RequestPopulateParam<T>
   sort?: StrapiRequestParamSort<T> | Array<StrapiRequestParamSort<T>>
   pagination?: PaginationByOffset | PaginationByPage
   filters?: Record<string, unknown>
@@ -19,6 +19,21 @@ export interface Strapi5RequestParams<T> {
   locale?: StrapiLocale | null
 }
 
+export type Strapi5RequestPopulateParams<T> = Pick<Strapi5RequestParams<T>, 'fields' | 'sort' | 'populate' | 'filters'>
+
+// Unified type for Strapi populate, combining both string paths and nested objects.
+export type Strapi5RequestPopulateParam<T> =
+  | '*' // Populate all relations.
+  | { [K in keyof T]?: // Nested object population.
+    T[K] extends object
+      ? T[K] extends Array<infer I>
+        ? Strapi5RequestPopulateParam<I> | Strapi5RequestPopulateParams<I>
+        : Strapi5RequestPopulateParam<T[K]> | Strapi5RequestPopulateParams<T[K]>
+      : never
+  }
+  | StrapiRequestParamPopulate<T> // String paths like "field.subfield".
+  | Array<StrapiRequestParamPopulate<T>> // Array of string paths.
+
 export interface StrapiSystemFields {
   documentId: string
   locale?: string