diff --git a/package.json b/package.json
index 9665c69..1be8986 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tiny-crud",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Lightweight Data Repository Based on Git Issue API",
   "main": "dist/bundle.cjs.js",
   "module": "dist/bundle.esm.js",
diff --git a/src/repository-lib/base/base-repository.ts b/src/repository-lib/base/base-repository.ts
index 9d4b59f..f48b444 100644
--- a/src/repository-lib/base/base-repository.ts
+++ b/src/repository-lib/base/base-repository.ts
@@ -56,11 +56,6 @@ export abstract class BaseRepository<T extends BaseModel> {
     protected cleanParams(params?: BaseParams): BaseParams | undefined {
         if (params == null) return;
         const copyParams = JSON.parse(JSON.stringify(params));
-        for (const key in copyParams) {
-            if (copyParams[key] == null) {
-                delete copyParams[key];
-            }
-        }
         return Object.keys(copyParams).length > 0 ? copyParams : undefined;
     }
 
@@ -71,7 +66,7 @@ export abstract class BaseRepository<T extends BaseModel> {
      */
     async find(params?: BaseParams): Promise<T[]> {
         const url = this.getRoute(RouteType.find);
-        const response = await this.request.get<BaseComment[]>(url, params);
+        const response = await this.request.get<BaseComment[]>(url, this.cleanParams(params));
         return response.map((item) => this.deserialize<T>(item));
     }
 
diff --git a/src/repository-lib/gitee/gitee-repository.ts b/src/repository-lib/gitee/gitee-repository.ts
index 83c78bd..2cacbd8 100644
--- a/src/repository-lib/gitee/gitee-repository.ts
+++ b/src/repository-lib/gitee/gitee-repository.ts
@@ -25,7 +25,7 @@ export class GiteeRepository<T extends BaseModel> extends BaseRepository<T> {
      * @returns A promise that resolves to an array of items.
      */
     async find(params?: GiteeParams): Promise<T[]> {
-        return super.find(this.cleanParams(params));
+        return super.find(params);
     }
 
     /**
diff --git a/src/repository-lib/github/github-repository.ts b/src/repository-lib/github/github-repository.ts
index 7a8078d..246eb93 100644
--- a/src/repository-lib/github/github-repository.ts
+++ b/src/repository-lib/github/github-repository.ts
@@ -24,7 +24,7 @@ export class GithubRepository<T extends BaseModel> extends BaseRepository<T> {
      * @returns A promise that resolves to an array of items.
      */
     async find(params?: GithubParams): Promise<T[]> {
-        return super.find(this.cleanParams(params));
+        return super.find(params);
     }
 
     /**
diff --git a/src/repository-lib/gitlab/gitlab-repository.ts b/src/repository-lib/gitlab/gitlab-repository.ts
index 805392c..db36294 100644
--- a/src/repository-lib/gitlab/gitlab-repository.ts
+++ b/src/repository-lib/gitlab/gitlab-repository.ts
@@ -41,8 +41,8 @@ export class GitlabRepository<T extends BaseModel> extends BaseRepository<T> {
      */
     async find(params?: GitlabParams): Promise<T[]> {
         const url = this.getRoute(RouteType.find);
-        const response = await this.request.get<BaseComment[]>(url, this.cleanParams(params));
-        return response.filter(item => item['system'] === false).map((item) => this.deserialize<T>(item));
+        const response = await this.request.get<BaseComment[]>(url, super.cleanParams(params));
+        return response.filter(item => item['system'] === false).map((item) => super.deserialize<T>(item));
     }
 
     /**
@@ -54,9 +54,9 @@ export class GitlabRepository<T extends BaseModel> extends BaseRepository<T> {
      */
     async updateById(id: number, data: PlainObject<T>): Promise<T> {
         const url = this.getRoute(RouteType.updateById, id);
-        const body = this.serialize<PlainObject<T>>(data);
+        const body = super.serialize<PlainObject<T>>(data);
         const response = await this.request.put<BaseComment>(url, body);
-        return this.deserialize<T>(response);
+        return super.deserialize<T>(response);
     }
 
     /**