diff --git a/CHANGELOG.md b/CHANGELOG.md
index cffd304..1bcabe7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### 2.2.1 (Next)
 
 * Your contribution here.
+* [#180](https://github.com/slack-ruby/slack-ruby-bot-server/pull/180): Add support for Grape v3 - [@markokajzer](https://github.com/markokajzer).
 
 ### 2.2.0 (2025/09/22)
 
diff --git a/lib/slack-ruby-bot-server/api/helpers/error_helpers.rb b/lib/slack-ruby-bot-server/api/helpers/error_helpers.rb
index 2f12606..8732c0f 100644
--- a/lib/slack-ruby-bot-server/api/helpers/error_helpers.rb
+++ b/lib/slack-ruby-bot-server/api/helpers/error_helpers.rb
@@ -10,42 +10,42 @@ module ErrorHelpers
             Middleware.logger.error "#{e.class.name}: #{e.message}\n  #{backtrace}"
             error = { type: 'other_error', message: e.message }
             error[:backtrace] = backtrace
-            rack_response(error.to_json, 400)
+            error!(error, 400)
           end
           # rescue document validation errors into detail json
           if SlackRubyBotServer::Config.mongoid?
             rescue_from Mongoid::Errors::Validations do |e|
               backtrace = e.backtrace[0..5].join("\n  ")
               Middleware.logger.warn "#{e.class.name}: #{e.message}\n  #{backtrace}"
-              rack_response({
-                type: 'param_error',
-                message: e.document.errors.full_messages.uniq.join(', ') + '.',
-                detail: e.document.errors.messages.each_with_object({}) do |(k, v), h|
-                  h[k] = v.uniq
-                end
-              }.to_json, 400)
+              error!({
+                       type: 'param_error',
+                       message: e.document.errors.full_messages.uniq.join(', ') + '.',
+                       detail: e.document.errors.messages.each_with_object({}) do |(k, v), h|
+                         h[k] = v.uniq
+                       end
+                     }, 400)
             end
           end
           rescue_from Grape::Exceptions::Validation do |e|
             backtrace = e.backtrace[0..5].join("\n  ")
             Middleware.logger.warn "#{e.class.name}: #{e.message}\n  #{backtrace}"
-            rack_response({
-              type: 'param_error',
-              message: 'Invalid parameters.',
-              detail: { e.params.join(', ') => [e.message] }
-            }.to_json, 400)
+            error!({
+                     type: 'param_error',
+                     message: 'Invalid parameters.',
+                     detail: { e.params.join(', ') => [e.message] }
+                   }, 400)
           end
           rescue_from Grape::Exceptions::ValidationErrors do |e|
             backtrace = e.backtrace[0..5].join("\n  ")
             Middleware.logger.warn "#{e.class.name}: #{e.message}\n  #{backtrace}"
-            rack_response({
-              type: 'param_error',
-              message: 'Invalid parameters.',
-              detail: e.errors.each_with_object({}) do |(k, v), h|
-                # JSON does not permit having a key of type Array
-                h[k.count == 1 ? k.first : k.join(', ')] = v
-              end
-            }.to_json, 400)
+            error!({
+                     type: 'param_error',
+                     message: 'Invalid parameters.',
+                     detail: e.errors.each_with_object({}) do |(k, v), h|
+                       # JSON does not permit having a key of type Array
+                       h[k.count == 1 ? k.first : k.join(', ')] = v
+                     end
+                   }, 400)
           end
         end
       end