diff --git a/services/apps/assignments/src/embedding/embedding.controller.ts b/services/apps/assignments/src/embedding/embedding.controller.ts
index 877110840..1fb03a467 100644
--- a/services/apps/assignments/src/embedding/embedding.controller.ts
+++ b/services/apps/assignments/src/embedding/embedding.controller.ts
@@ -1,15 +1,14 @@
 import {Controller, ForbiddenException, Get, Param, ParseBoolPipe, Post, Query} from '@nestjs/common';
 import {
   ApiCreatedResponse,
-  ApiExtraModels,
   ApiForbiddenResponse,
   ApiOkResponse,
-  ApiOperation, ApiParam,
+  ApiOperation,
+  ApiParam,
   ApiTags,
-  refs
 } from "@nestjs/swagger";
 import {AssignmentAuth} from "../assignment/assignment-auth.decorator";
-import {Embeddable, EmbeddingEstimate, SnippetEmbeddable, TaskEmbeddable} from "./embedding.dto";
+import {Embeddable, EmbeddingEstimate} from "./embedding.dto";
 import {EmbeddingService} from "./embedding.service";
 import {notFound} from "@mean-stream/nestx";
 import {AssignmentService} from "../assignment/assignment.service";
diff --git a/services/apps/assignments/src/embedding/openai.service.ts b/services/apps/assignments/src/embedding/openai.service.ts
index adf3636e6..3d6038986 100644
--- a/services/apps/assignments/src/embedding/openai.service.ts
+++ b/services/apps/assignments/src/embedding/openai.service.ts
@@ -16,7 +16,7 @@ export class OpenAIService implements OnModuleDestroy {
 
   countTokens(files: File[]): number {
     let total = 0;
-    for (let file of files) {
+    for (const file of files) {
       if (!this.isSupportedExtension(file.name)) {
         continue;
       }
diff --git a/services/apps/assignments/src/solution/solution.dto.ts b/services/apps/assignments/src/solution/solution.dto.ts
index 8b61ad607..12b181b5c 100644
--- a/services/apps/assignments/src/solution/solution.dto.ts
+++ b/services/apps/assignments/src/solution/solution.dto.ts
@@ -1,4 +1,4 @@
-import {ApiProperty, ApiPropertyOptional, OmitType, PartialType} from '@nestjs/swagger';
+import {ApiPropertyOptional, OmitType, PartialType} from '@nestjs/swagger';
 import {Types} from 'mongoose';
 import {Solution} from './solution.schema';
 import {AsObjectId} from "@mean-stream/nestx";
diff --git a/services/apps/assignments/src/solution/solution.service.ts b/services/apps/assignments/src/solution/solution.service.ts
index 8fe828ffa..28edb05ce 100644
--- a/services/apps/assignments/src/solution/solution.service.ts
+++ b/services/apps/assignments/src/solution/solution.service.ts
@@ -55,12 +55,12 @@ export class SolutionService {
 
       const update: UpdateQuery<Solution> = rest;
       if (author) {
-        for (let [k, v] of Object.entries(author)) {
+        for (const [k, v] of Object.entries(author)) {
           update['author.' + k] = v;
         }
       }
       if (consent) {
-        for (let [k, v] of Object.entries(consent)) {
+        for (const [k, v] of Object.entries(consent)) {
           update['consent.' + k] = v;
         }
       }
diff --git a/services/apps/assignments/src/utils.ts b/services/apps/assignments/src/utils.ts
index 73a969370..7757ce7ed 100644
--- a/services/apps/assignments/src/utils.ts
+++ b/services/apps/assignments/src/utils.ts
@@ -3,7 +3,7 @@ import {WsResponse} from '@nestjs/websockets';
 import {isUUID} from 'class-validator';
 import {randomBytes} from 'crypto';
 import {FilterQuery} from 'mongoose';
-import {interval, map, mapTo, merge, Observable, tap} from 'rxjs';
+import {interval, map, mapTo, merge, Observable} from 'rxjs';
 
 export function generateToken(): string {
   const bytes = randomBytes(8);
diff --git a/services/apps/projects/src/project/project.service.ts b/services/apps/projects/src/project/project.service.ts
index 596819ebb..7c9770723 100644
--- a/services/apps/projects/src/project/project.service.ts
+++ b/services/apps/projects/src/project/project.service.ts
@@ -50,7 +50,7 @@ export class ProjectService {
   }
 
   private removeStorage(id: string) {
-    for (let type of projectStorageTypes) {
+    for (const type of projectStorageTypes) {
       fs.promises.rm(this.getStoragePath(type, id), {recursive: true}).catch(e => {
         console.error(`Failed to remove project '${id}' storage '${type}': ${e.message}`);
       });