diff --git a/packages/backend/scripts/src/functions/pack.ts b/packages/backend/scripts/src/functions/pack.ts
index 81905191..2bd841aa 100644
--- a/packages/backend/scripts/src/functions/pack.ts
+++ b/packages/backend/scripts/src/functions/pack.ts
@@ -8,8 +8,7 @@ const materialsFileName = 'LDConfig.ldr'
 
 const materialsFilePath = path.join(ldrawPath, materialsFileName)
 
-console.log('Loading materials file "' + materialsFilePath + '"...')
-const materialsContent = fs.readFileSync(materialsFilePath, { encoding: 'utf8' })
+var materialsContent: string = null
 
 export function packLDrawText(text: string) {
     const fileName = `${shortid()}.ldr`
@@ -49,6 +48,12 @@ export function packLDrawFile(fileName: string) {
         throw 'error'
     }
 
+	// Loading materials content
+	if (!materialsContent) {
+		console.log('Loading materials file "' + materialsFilePath + '"...')
+		materialsContent = fs.readFileSync(materialsFilePath, { encoding: 'utf8' })
+	}
+
     // Obtain packed content
     let packedContent = materialsContent + '\n'
     for (let i = objectsPaths.length - 1; i >= 0; i--) {
diff --git a/packages/backend/scripts/src/modules/rest/comments/comment.controller.ts b/packages/backend/scripts/src/modules/rest/comments/comment.controller.ts
index 7f6c6f12..5283b425 100644
--- a/packages/backend/scripts/src/modules/rest/comments/comment.controller.ts
+++ b/packages/backend/scripts/src/modules/rest/comments/comment.controller.ts
@@ -38,7 +38,7 @@ export class CommentController implements CommentREST {
     @ApiParam({ name: 'productId', type: 'string', required: true })
     @ApiParam({ name: 'issueId', type: 'string', required: true })
     @ApiBody({ type: CommentCreate, required: true })
-    @ApiResponse({ type: Comment })
+    @ApiResponse({ type: CommentRead })
     async addComment(
         @Param('productId') productId: string,
         @Param('issueId') issueId: string,
@@ -67,7 +67,7 @@ export class CommentController implements CommentREST {
     @ApiParam({ name: 'issueId', type: 'string', required: true })
     @ApiParam({ name: 'commentId', type: 'string', required: true })
     @ApiBody({ type: CommentUpdate, required: true })
-    @ApiResponse({ type: Comment })
+    @ApiResponse({ type: CommentRead })
     async updateComment(
         @Param('productId') productId: string,
         @Param('issueId') issueId: string,