diff --git a/src/pipeline-tasks/pipeline-tasks.service.spec.ts b/src/pipeline-tasks/pipeline-tasks.service.spec.ts
index 8fb76ba..a47a082 100644
--- a/src/pipeline-tasks/pipeline-tasks.service.spec.ts
+++ b/src/pipeline-tasks/pipeline-tasks.service.spec.ts
@@ -38,8 +38,8 @@ describe('PipelineTasksService', () => {
   beforeEach(async () => {
     redisClient = (() => ({
       set: jest.fn().mockImplementation(async () => 'OK'),
-      incr: jest.fn().mockImplementation(async () => 1),
-      decr: jest.fn().mockImplementation(async () => 0),
+      del: jest.fn().mockImplementation(async () => 'test'),
+      get: jest.fn().mockImplementation(async () => 'test'),
       lpush: jest.fn().mockImplementation(async () => 1),
       rpop: jest.fn().mockImplementation(async () => JSON.stringify(getTask())),
     }))() as any;
@@ -103,6 +103,9 @@ describe('PipelineTasksService', () => {
       const save = jest
         .spyOn(taskRepository, 'save')
         .mockImplementation(async (data: any) => data);
+      jest
+        .spyOn(service, 'doNextTask')
+        .mockImplementation(async () => undefined);
       await service.addTask({ pipelineId: 'test', commit: 'test', units: [] }),
         expect(save.mock.calls[0][0]).toMatchObject({
           pipelineId: 'test',
@@ -113,6 +116,9 @@ describe('PipelineTasksService', () => {
     it('add task', async () => {
       const lpush = jest.spyOn(redisClient, 'lpush');
       const doNextTask = jest.spyOn(service, 'doNextTask');
+      jest
+        .spyOn(service, 'doNextTask')
+        .mockImplementation(async () => undefined);
       await service.addTask({ pipelineId: 'test', commit: 'test', units: [] });
       expect(typeof lpush.mock.calls[0][1] === 'string').toBeTruthy();
       expect(JSON.parse(lpush.mock.calls[0][1] as string)).toMatchObject({
@@ -127,15 +133,24 @@ describe('PipelineTasksService', () => {
 
   describe('doNextTask', () => {
     it('add task to queue', async () => {
-      const decr = jest.spyOn(redisClient, 'decr');
+      let lckValue: string;
+      const set = jest
+        .spyOn(redisClient, 'set')
+        .mockImplementation(async (...args) => (lckValue = args[3] as string));
+      const get = jest
+        .spyOn(redisClient, 'get')
+        .mockImplementation(async () => lckValue);
+      const del = jest.spyOn(redisClient, 'del');
       const rpop = jest.spyOn(redisClient, 'rpop');
       const add = jest.spyOn(taskQueue, 'add');
 
       await service.doNextTask(getBasePipeline());
 
       expect(add).toHaveBeenCalledWith(getTask());
-      expect(decr).toHaveBeenCalledTimes(1);
+      expect(set).toHaveBeenCalledTimes(1);
       expect(rpop).toHaveBeenCalledTimes(1);
+      expect(get).toHaveBeenCalledTimes(1);
+      expect(del).toHaveBeenCalledTimes(1);
     });
     it('pipeline is busy', async () => {
       let remainTimes = 3;
@@ -155,15 +170,21 @@ describe('PipelineTasksService', () => {
       expect(add).toHaveBeenCalledWith(getTask());
     });
     it('pipeline always busy and timeout', async () => {
-      const incr = jest.spyOn(redisClient, 'incr').mockImplementation(() => 3);
-      const decr = jest.spyOn(redisClient, 'decr');
+      const set = jest
+        .spyOn(redisClient, 'set')
+        .mockImplementation(async () => {
+          throw new Error();
+        });
+      const get = jest.spyOn(redisClient, 'get');
+      const del = jest.spyOn(redisClient, 'del');
 
       await expect(
         service.doNextTask(getBasePipeline()),
       ).rejects.toBeInstanceOf(LockFailedException);
 
-      expect(decr).toHaveBeenCalledTimes(5);
-      expect(incr).toHaveBeenCalledTimes(5);
+      expect(set).toHaveBeenCalledTimes(5);
+      expect(get).toHaveBeenCalledTimes(0);
+      expect(del).toHaveBeenCalledTimes(0);
     }, 15_000);
   });
 });
diff --git a/src/pipeline-tasks/pipeline-tasks.service.ts b/src/pipeline-tasks/pipeline-tasks.service.ts
index a5d6475..5e94020 100644
--- a/src/pipeline-tasks/pipeline-tasks.service.ts
+++ b/src/pipeline-tasks/pipeline-tasks.service.ts
@@ -29,33 +29,41 @@ export class PipelineTasksService {
     const task = await this.repository.save(this.repository.create(dto));
     task.pipeline = pipeline;
 
-    const [lckKey, tasksKey] = this.getRedisTokens(pipeline);
+    const tasksKey = this.getRedisTokens(pipeline)[1];
     const redis = this.redis.getClient();
-    await redis.lpush(tasksKey, JSON.stringify(task)).finally(() => {
-      return redis.decr(lckKey);
-    });
+    await redis.lpush(tasksKey, JSON.stringify(task));
     await this.doNextTask(pipeline);
   }
 
   async doNextTask(pipeline: Pipeline) {
     const [lckKey, tasksKey] = this.getRedisTokens(pipeline);
     const redis = this.redis.getClient();
-    await redis.set(lckKey, 0, 'EX', 10, 'NX');
 
-    await new Promise(async (resolve, reject) => {
-      for (let i = 0; i < 5; i++) {
-        if ((await redis.incr(lckKey)) === 1) {
-          resolve(undefined);
-          return;
+    const unLck = await new Promise<() => Promise<void>>(
+      async (resolve, reject) => {
+        const lckValue = Date.now().toString();
+        for (let i = 0; i < 5; i++) {
+          if (
+            await redis
+              .set(lckKey, 0, 'EX', lckValue, 'NX')
+              .then(() => true)
+              .catch(() => false)
+          ) {
+            resolve(async () => {
+              if ((await redis.get(lckKey)) === lckValue) {
+                await redis.del(lckKey);
+              }
+            });
+            return;
+          }
+          await new Promise((resolve) => setTimeout(resolve, 2000));
         }
-        await redis.decr(lckKey);
-        await new Promise((resolve) => setTimeout(resolve, 2000));
-      }
-      reject(new LockFailedException(lckKey));
-    });
+        reject(new LockFailedException(lckKey));
+      },
+    );
 
     const task = JSON.parse(
-      (await redis.rpop(tasksKey).finally(() => redis.decr(lckKey))) ?? 'null',
+      (await redis.rpop(tasksKey).finally(() => unLck())) ?? 'null',
     );
     if (task) {
       await this.queue.add(task);