diff --git a/package-lock.json b/package-lock.json
index eb207077..ff8c83b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3260,6 +3260,15 @@
       "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
       "dev": true
     },
+    "@types/archiver": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/@types/archiver/-/archiver-5.1.0.tgz",
+      "integrity": "sha512-baFOhanb/hxmcOd1Uey2TfFg43kTSmM6py1Eo7Rjbv/ivcl7PXLhY0QgXGf50Hx/eskGCFqPfhs/7IZLb15C5g==",
+      "dev": true,
+      "requires": {
+        "@types/glob": "*"
+      }
+    },
     "@types/bcrypt": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/@types/bcrypt/-/bcrypt-3.0.1.tgz",
diff --git a/package.json b/package.json
index 9f3234c8..058b499b 100644
--- a/package.json
+++ b/package.json
@@ -76,6 +76,7 @@
     "@angular/platform-browser-dynamic": "11.2.9",
     "@angular/router": "11.2.9",
     "@ngx-loading-bar/core": "5.1.1",
+    "@types/archiver": "^5.1.0",
     "@types/bcrypt": "3.0.1",
     "@types/bcryptjs": "2.4.2",
     "@types/chai": "4.2.16",
diff --git a/src/backend/middlewares/GalleryMWs.ts b/src/backend/middlewares/GalleryMWs.ts
index a2b6ed48..903f0b24 100644
--- a/src/backend/middlewares/GalleryMWs.ts
+++ b/src/backend/middlewares/GalleryMWs.ts
@@ -1,5 +1,6 @@
 import * as path from 'path';
 import {promises as fsp} from 'fs';
+import * as archiver from 'archiver';
 import {NextFunction, Request, Response} from 'express';
 import {ErrorCodes, ErrorDTO} from '../../common/entities/Error';
 import {DirectoryDTO, DirectoryDTOUtils} from '../../common/entities/DirectoryDTO';
@@ -75,8 +76,6 @@ export class GalleryMWs {
       res.set('Content-Type', 'application/zip');
       res.set('Content-Disposition', 'attachment; filename=Gallery.zip');
 
-      const fs = require('fs');
-      const archiver = require('archiver');
       const archive = archiver('zip');
 
       res.on('close', function() {
@@ -89,21 +88,18 @@ export class GalleryMWs {
 
       archive.pipe(res);
 
-      // append photos in selected directory
+      // append photos in absoluteDirectoryName
+      // using case-insensitive glob of extensions
       for (const ext of SupportedFormats.WithDots.Photos) {
         archive.glob(`*${ext}`, {cwd:absoluteDirectoryName, nocase:true});
       }
-      // append videos in selected directory
+      // append videos in absoluteDirectoryName
+      // using case-insensitive glob of extensions
       for (const ext of SupportedFormats.WithDots.Videos) {
         archive.glob(`*${ext}`, {cwd:absoluteDirectoryName, nocase:true});
       }
 
-      await archive.finalize(function(err: any) {
-        if (err) {
-          throw err;
-        }
-        req.resultPipe = true;
-      });
+      await archive.finalize();
       return next();
 
     } catch (err) {
diff --git a/src/backend/middlewares/RenderingMWs.ts b/src/backend/middlewares/RenderingMWs.ts
index 7e3b5f06..9f2636be 100644
--- a/src/backend/middlewares/RenderingMWs.ts
+++ b/src/backend/middlewares/RenderingMWs.ts
@@ -71,13 +71,6 @@ export class RenderingMWs {
     return res.sendFile(req.resultPipe, {maxAge: 31536000, dotfiles: 'allow'});
   }
 
-  public static renderZipStream(req: Request, res: Response, next: NextFunction): any {
-    if (!req.resultPipe) {
-      return next();
-    }
-    return res;
-  }
-
   public static renderOK(req: Request, res: Response, next: NextFunction): void {
     const message = new Message<string>(null, 'ok');
     res.json(message);
diff --git a/src/backend/routes/GalleryRouter.ts b/src/backend/routes/GalleryRouter.ts
index e219c7f8..8aa35545 100644
--- a/src/backend/routes/GalleryRouter.ts
+++ b/src/backend/routes/GalleryRouter.ts
@@ -53,8 +53,7 @@ export class GalleryRouter {
       AuthenticationMWs.authorisePath('directory', true),
 
       // specific part
-      GalleryMWs.zipDirectory,
-      RenderingMWs.renderZipStream
+      GalleryMWs.zipDirectory
     );
   }