diff --git a/backend/src/entities/connection/connection.controller.ts b/backend/src/entities/connection/connection.controller.ts
index 7356ea1d2..0aa97218c 100644
--- a/backend/src/entities/connection/connection.controller.ts
+++ b/backend/src/entities/connection/connection.controller.ts
@@ -726,7 +726,7 @@ export class ConnectionController {
 		status: 200,
 		type: ConnectionDiagramResponseDTO,
 	})
-	@UseGuards(ConnectionReadGuard)
+	@UseGuards(ConnectionEditGuard)
 	@Get('/connection/diagram/:connectionId')
 	async getConnectionDiagram(
 		@SlugUuid('connectionId') connectionId: string,