diff --git a/src/app/api/notary/OfficeFolderAnchorsController.ts b/src/app/api/notary/OfficeFolderAnchorsController.ts
index 0a93eb4a..29f9e0ea 100644
--- a/src/app/api/notary/OfficeFolderAnchorsController.ts
+++ b/src/app/api/notary/OfficeFolderAnchorsController.ts
@@ -56,6 +56,7 @@ export default class OfficeFoldersController extends ApiController {
 			const sortedHashes = [...folderHashes].sort();
 			const buffer = await this.secureService.download(sortedHashes);
 
+			response.setHeader('Content-Type', 'application/pdf');
 			this.httpSuccess(response, buffer);
 		} catch (error) {
 			this.httpInternalError(response, error);
diff --git a/src/common/config/variables/Variables.ts b/src/common/config/variables/Variables.ts
index 5a0d22dd..c052d91c 100644
--- a/src/common/config/variables/Variables.ts
+++ b/src/common/config/variables/Variables.ts
@@ -100,9 +100,6 @@ export class BackendVariables {
 	@IsNotEmpty()
 	public readonly DOCAPOST_CONNECT_PROCESS_ID!: string;
 
-	@IsNotEmpty()
-	public readonly BACK_API_HOST!: string;
-
 	@IsNotEmpty()
 	public readonly DOCAPOST_APP_ID!: string;
 
@@ -143,7 +140,6 @@ export class BackendVariables {
 		this.DOCAPOST_VERSION = process.env["DOCAPOST_VERSION"]!;
 		this.DOCAPOST_DOCUMENT_PROCESS_ID = process.env["DOCAPOST_DOCUMENT_PROCESS_ID"]!;
 		this.DOCAPOST_CONNECT_PROCESS_ID = process.env["DOCAPOST_CONNECT_PROCESS_ID"]!;
-		this.BACK_API_HOST = process.env["BACK_API_HOST"]!;
 		this.DOCAPOST_APP_ID = process.env["DOCAPOST_APP_ID"]!;
 		this.DOCAPOST_APP_PASSWORD = process.env["DOCAPOST_APP_PASSWORD"]!;