diff --git a/packages/core/__tests__/decorators/inject-query-service.decorator.spec.ts b/packages/core/__tests__/decorators/inject-query-service.decorator.spec.ts
new file mode 100644
index 000000000..41ec9f7e1
--- /dev/null
+++ b/packages/core/__tests__/decorators/inject-query-service.decorator.spec.ts
@@ -0,0 +1,18 @@
+import * as nestjsCommon from '@nestjs/common';
+import { QueryService, InjectQueryService, getQueryServiceToken } from '../../src';
+
+describe('@InjectQueryService', () => {
+  const injectSpy = jest.spyOn(nestjsCommon, 'Inject');
+
+  class TestEntity {}
+
+  it('call inject with the correct key', () => {
+    // @ts-ignore
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    class Test {
+      constructor(@InjectQueryService(TestEntity) readonly service: QueryService<TestEntity>) {}
+    }
+    expect(injectSpy).toBeCalledTimes(1);
+    expect(injectSpy).toBeCalledWith(getQueryServiceToken(TestEntity));
+  });
+});
diff --git a/packages/core/src/decorators/helpers.ts b/packages/core/src/decorators/helpers.ts
new file mode 100644
index 000000000..98cf06ebd
--- /dev/null
+++ b/packages/core/src/decorators/helpers.ts
@@ -0,0 +1,5 @@
+import { Class } from '../common';
+
+export function getQueryServiceToken<DTO>(DTOClass: Class<DTO>): string {
+  return `${DTOClass.name}QueryService`;
+}
diff --git a/packages/core/src/decorators/index.ts b/packages/core/src/decorators/index.ts
new file mode 100644
index 000000000..defc3b235
--- /dev/null
+++ b/packages/core/src/decorators/index.ts
@@ -0,0 +1,2 @@
+export { getQueryServiceToken } from './helpers';
+export { InjectQueryService } from './inject-query-service.decorator';
diff --git a/packages/core/src/decorators/inject-query-service.decorator.ts b/packages/core/src/decorators/inject-query-service.decorator.ts
new file mode 100644
index 000000000..da371b705
--- /dev/null
+++ b/packages/core/src/decorators/inject-query-service.decorator.ts
@@ -0,0 +1,5 @@
+import { Inject } from '@nestjs/common';
+import { Class } from '../common';
+import { getQueryServiceToken } from './helpers';
+
+export const InjectQueryService = <DTO>(entity: Class<DTO>): ParameterDecorator => Inject(getQueryServiceToken(entity));
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index feefb597c..3d3f7b0f4 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -1,13 +1,8 @@
 /* eslint-disable import/export */
 export * from './interfaces';
 export * from './common';
-export {
-  QueryService,
-  AssemblerQueryService,
-  RelationQueryService,
-  QueryServiceRelation,
-  getQueryServiceToken,
-} from './services';
+export { InjectQueryService, getQueryServiceToken } from './decorators';
+export { QueryService, AssemblerQueryService, RelationQueryService, QueryServiceRelation } from './services';
 export { transformFilter, transformQuery, transformSort, QueryFieldMap } from './helpers';
 export {
   ClassTransformerAssembler,
diff --git a/packages/core/src/services/index.ts b/packages/core/src/services/index.ts
index 44461680b..b448b8a2b 100644
--- a/packages/core/src/services/index.ts
+++ b/packages/core/src/services/index.ts
@@ -1,3 +1,3 @@
-export { QueryService, getQueryServiceToken } from './query.service';
+export { QueryService } from './query.service';
 export { AssemblerQueryService } from './assembler-query.service';
 export { RelationQueryService, QueryServiceRelation } from './relation-query.service';
diff --git a/packages/core/src/services/query.service.ts b/packages/core/src/services/query.service.ts
index a90f91b0a..e6b3e01d3 100644
--- a/packages/core/src/services/query.service.ts
+++ b/packages/core/src/services/query.service.ts
@@ -167,7 +167,3 @@ export function QueryService<DTO>(DTOClass: Class<DTO>) {
     return Injectable()(cls);
   };
 }
-
-export function getQueryServiceToken<DTO>(DTOClass: Class<DTO>): string {
-  return `${DTOClass.name}QueryService`;
-}
diff --git a/packages/query-sequelize/__tests__/decorators/inject-sequelize-query-service.decorator.spec.ts b/packages/query-sequelize/__tests__/decorators/inject-sequelize-query-service.decorator.spec.ts
deleted file mode 100644
index 3aac9bafa..000000000
--- a/packages/query-sequelize/__tests__/decorators/inject-sequelize-query-service.decorator.spec.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { getQueryServiceToken, QueryService } from '@nestjs-query/core';
-import * as nestjsCommon from '@nestjs/common';
-import { Model } from 'sequelize-typescript';
-import { InjectSequelizeQueryService } from '../../src';
-
-describe('@InjectSequelizeQueryService', () => {
-  const injectSpy = jest.spyOn(nestjsCommon, 'Inject');
-
-  class TestEntity extends Model<TestEntity> {}
-
-  it('call inject witht the correct key', () => {
-    // @ts-ignore
-    // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    class Test {
-      constructor(@InjectSequelizeQueryService(TestEntity) readonly service: QueryService<TestEntity>) {}
-    }
-    expect(injectSpy).toBeCalledTimes(1);
-    expect(injectSpy).toBeCalledWith(getQueryServiceToken(TestEntity));
-  });
-});
diff --git a/packages/query-sequelize/src/decorators/index.ts b/packages/query-sequelize/src/decorators/index.ts
deleted file mode 100644
index 98df7a2ea..000000000
--- a/packages/query-sequelize/src/decorators/index.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { InjectSequelizeQueryService } from './inject-sequelize-query-service.decorator';
diff --git a/packages/query-sequelize/src/decorators/inject-sequelize-query-service.decorator.ts b/packages/query-sequelize/src/decorators/inject-sequelize-query-service.decorator.ts
deleted file mode 100644
index cfc7e942f..000000000
--- a/packages/query-sequelize/src/decorators/inject-sequelize-query-service.decorator.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { getQueryServiceToken } from '@nestjs-query/core';
-import { Inject } from '@nestjs/common';
-import { Model, ModelCtor } from 'sequelize-typescript';
-
-export const InjectSequelizeQueryService = <Entity extends Model<Entity>>(
-  entity: ModelCtor<Entity>,
-): ParameterDecorator => Inject(getQueryServiceToken(entity));
diff --git a/packages/query-sequelize/src/index.ts b/packages/query-sequelize/src/index.ts
index 9ddcc0a65..0a9e91d19 100644
--- a/packages/query-sequelize/src/index.ts
+++ b/packages/query-sequelize/src/index.ts
@@ -1,3 +1,2 @@
 export { SequelizeQueryService } from './services';
-export { InjectSequelizeQueryService } from './decorators';
 export { NestjsQuerySequelizeModule } from './module';
diff --git a/packages/query-typeorm/__tests__/decorators/inject-typeorm-query-service.decorator.spec.ts b/packages/query-typeorm/__tests__/decorators/inject-typeorm-query-service.decorator.spec.ts
deleted file mode 100644
index 16b136839..000000000
--- a/packages/query-typeorm/__tests__/decorators/inject-typeorm-query-service.decorator.spec.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { QueryService } from '@nestjs-query/core';
-import { getQueryServiceToken } from '@nestjs-query/core/src';
-import * as nestjsCommon from '@nestjs/common';
-import { InjectTypeOrmQueryService } from '../../src/decorators';
-
-describe('@InjectTypeOrmQueryService', () => {
-  const injectSpy = jest.spyOn(nestjsCommon, 'Inject');
-
-  class TestEntity {}
-
-  it('call inject witht the correct key', () => {
-    // @ts-ignore
-    // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    class Test {
-      constructor(@InjectTypeOrmQueryService(TestEntity) readonly service: QueryService<TestEntity>) {}
-    }
-    expect(injectSpy).toBeCalledTimes(1);
-    expect(injectSpy).toBeCalledWith(getQueryServiceToken(TestEntity));
-  });
-});
diff --git a/packages/query-typeorm/src/decorators/index.ts b/packages/query-typeorm/src/decorators/index.ts
deleted file mode 100644
index e9a8fddc7..000000000
--- a/packages/query-typeorm/src/decorators/index.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { InjectTypeOrmQueryService } from './inject-typeorm-query-service.decorator';
diff --git a/packages/query-typeorm/src/decorators/inject-typeorm-query-service.decorator.ts b/packages/query-typeorm/src/decorators/inject-typeorm-query-service.decorator.ts
deleted file mode 100644
index fe6a06f0f..000000000
--- a/packages/query-typeorm/src/decorators/inject-typeorm-query-service.decorator.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { Class, getQueryServiceToken } from '@nestjs-query/core';
-import { Inject } from '@nestjs/common';
-
-export const InjectTypeOrmQueryService = <Entity>(entity: Class<Entity>): ParameterDecorator =>
-  Inject(getQueryServiceToken(entity));
diff --git a/packages/query-typeorm/src/index.ts b/packages/query-typeorm/src/index.ts
index bdc22e3de..34fe2dd43 100644
--- a/packages/query-typeorm/src/index.ts
+++ b/packages/query-typeorm/src/index.ts
@@ -1,3 +1,2 @@
 export { TypeOrmQueryService, TypeOrmQueryServiceOpts } from './services';
-export { InjectTypeOrmQueryService } from './decorators';
 export { NestjsQueryTypeOrmModule } from './module';