diff --git a/app/controllers/my_module_comments_controller.rb b/app/controllers/my_module_comments_controller.rb
index ff1e58baa..4b93ce99d 100644
--- a/app/controllers/my_module_comments_controller.rb
+++ b/app/controllers/my_module_comments_controller.rb
@@ -72,12 +72,12 @@ class MyModuleCommentsController < ApplicationController
         }
         format.json {
           render json: {
-            html: render_to_string({
+            html: render_to_string(
               partial: "comment.html.erb",
               locals: {
                 comment: @comment
               }
-            }),
+            ),
             date: @comment.created_at.strftime('%d.%m.%Y')
           },
           status: :created
diff --git a/app/controllers/project_comments_controller.rb b/app/controllers/project_comments_controller.rb
index ed17e0a62..6f097b870 100644
--- a/app/controllers/project_comments_controller.rb
+++ b/app/controllers/project_comments_controller.rb
@@ -71,12 +71,12 @@ class ProjectCommentsController < ApplicationController
         }
         format.json {
           render json: {
-            html: render_to_string({
+            html: render_to_string(
               partial: 'comment.html.erb',
               locals: {
                 comment: @comment
               }
-            }),
+            ),
             date: @comment.created_at.strftime('%d.%m.%Y')
           }, status: :created
         }
diff --git a/app/controllers/result_comments_controller.rb b/app/controllers/result_comments_controller.rb
index 39b8c3598..ad9bf91ce 100644
--- a/app/controllers/result_comments_controller.rb
+++ b/app/controllers/result_comments_controller.rb
@@ -69,12 +69,12 @@ class ResultCommentsController < ApplicationController
         }
         format.json {
           render json: {
-            html: render_to_string({
+            html: render_to_string(
               partial: "comment.html.erb",
               locals: {
                 comment: @comment
               }
-            }),
+            ),
             date: @comment.created_at.strftime('%d.%m.%Y')
           },
           status: :created
diff --git a/app/controllers/step_comments_controller.rb b/app/controllers/step_comments_controller.rb
index 998d9a339..674434486 100644
--- a/app/controllers/step_comments_controller.rb
+++ b/app/controllers/step_comments_controller.rb
@@ -73,12 +73,12 @@ class StepCommentsController < ApplicationController
         }
         format.json {
           render json: {
-            html: render_to_string({
+            html: render_to_string(
               partial: "comment.html.erb",
               locals: {
                 comment: @comment
               }
-            }),
+            ),
             date: @comment.created_at.strftime('%d.%m.%Y')
           },
           status: :created