diff --git a/idp/src/model/entity/user.entity.ts b/idp/src/model/entity/user.entity.ts
index b8f509f..d823895 100644
--- a/idp/src/model/entity/user.entity.ts
+++ b/idp/src/model/entity/user.entity.ts
@@ -57,6 +57,10 @@ export class User {
   @ManyToMany(() => Client, (client) => client.admins)
   clients?: Client[];
 
+  @Exclude()
+  @Column({ type: 'int', default: 0 })
+  pwRevision?: number; // wird hochgezählt wenn das PW geändert wird. somit kann der Token invalid gesetzt werden.
+
   accessToken?: string;
   refreshToken?: string;
   session_key?: string;
diff --git a/idp/src/model/interface/index.ts b/idp/src/model/interface/index.ts
index 644d822..7cf0ac0 100644
--- a/idp/src/model/interface/index.ts
+++ b/idp/src/model/interface/index.ts
@@ -1,3 +1,4 @@
 export * from './authenticated.request';
 export * from './logger.interface';
 export * from './mailconfig.interface';
+export * from './payload.interface';
diff --git a/idp/src/model/interface/payload.interface.ts b/idp/src/model/interface/payload.interface.ts
new file mode 100644
index 0000000..99f5f54
--- /dev/null
+++ b/idp/src/model/interface/payload.interface.ts
@@ -0,0 +1,18 @@
+export interface IAccessPayload {
+  username: string;
+  firstName: string;
+  lastName: string;
+  id: string;
+  iss: string;
+  aud: string;
+  iat: number;
+  exp: number;
+}
+
+export interface IRefreshPayload {
+  type: string;
+  id: string;
+  token_revision: number;
+  iat: number;
+  exp: number;
+}
diff --git a/idp/src/shared/users.service.ts b/idp/src/shared/users.service.ts
index 632ae92..00a60c8 100644
--- a/idp/src/shared/users.service.ts
+++ b/idp/src/shared/users.service.ts
@@ -15,6 +15,8 @@ import {
   AuthorizationCodeRepository,
   AuthorizationCode,
   ActivityLogRepository,
+  IAccessPayload,
+  IRefreshPayload,
 } from 'src/model';
 import { CustomLogger } from './logger/custom.logger';
 
@@ -126,7 +128,6 @@ export class UsersService {
     if (getUserAccessToken) {
       user.accessToken = this.createAccessToken(user);
       user.refreshToken = this.createRefreshToken(user);
-      console.log(this.jwtService.verify(user.accessToken))
       return user;
     }
 
@@ -206,25 +207,30 @@ export class UsersService {
       {
         type: 'refresh',
         id: user.id,
+        token_revision: user.pwRevision,
       },
       { expiresIn: '365d' },
     );
   }
 
   async getNewAccessToken(refreshToken: string) {
-    const payload = this.jwtService.verify(refreshToken);
+    const payload: IRefreshPayload = this.jwtService.verify(refreshToken);
     if (payload.type !== 'refresh') {
       this.logger.error(`Token ${refreshToken} is not a refresh token`);
       throw new HttpException('Invalid token', 401);
     }
     const user = await this.userRepo.findById(payload.id);
-    if (!user) {
+    if (
+      !user ||
+      payload['token_revision'] == undefined ||
+      payload['token_revision'] != user.pwRevision
+    ) {
       this.logger.error(`User ${payload.id} not found for refresh token`);
       throw new HttpException('Invalid token', 401);
     }
 
     const token = this.createAccessToken(user);
-    const pay = this.jwtService.decode(token);
+    const pay: IAccessPayload = this.jwtService.decode(token);
     const result = {
       access_token: token,
       expires_in: pay.exp - pay.iat,
@@ -238,7 +244,7 @@ export class UsersService {
     try {
       const decoded = this.jwtService.verify(token);
       this.activityRepo.logAccessTokenVerification();
-      console.log(decoded)
+      console.log(decoded, '-');
       return decoded;
     } catch (e) {
       this.logger.error(`Token ${token} is invalid. Error: ${e.message}`);
@@ -305,6 +311,7 @@ export class UsersService {
       if (savedCode && savedCode.user) {
         const hashedPassword = await bcrypt.hash(dto.password, 10);
         savedCode.user.password = hashedPassword;
+        savedCode.user.pwRevision += 1;
         await this.userRepo.save(savedCode.user);
         await this.resetPwRepo.remove(savedCode);
         await this.sessionRepo.delete({ user: { id: savedCode.user.id } });