diff --git a/docutranslate/static/index.html b/docutranslate/static/index.html
index 62660d9..2af301f 100644
--- a/docutranslate/static/index.html
+++ b/docutranslate/static/index.html
@@ -261,7 +261,6 @@
                                     <div class="accordion-body">
                                         <select class="form-select" v-model="form.workflow_type"
                                                 @change="saveSetting('translator_last_workflow', form.workflow_type)">
-                                            <option value="markdown_based">{{ t('workflowOptionMarkdown') }}</option>
                                             <option value="docx">{{ t('workflowOptionDocx') }}</option>
                                             <option value="xlsx">{{ t('workflowOptionXlsx') }}</option>
                                             <option value="epub">{{ t('workflowOptionEpub') }}</option>
@@ -1097,7 +1096,7 @@
 
             // Form Data
             const form = reactive({
-                workflow_type: 'markdown_based',
+                workflow_type: 'docx',
                 auto_workflow_enabled: true,
                 convert_engine: 'mineru',
                 mineru_token: '',
@@ -1631,9 +1630,11 @@
                             pptx: 'pptx',
                             ppt: 'pptx'
                         };
-                        const newWorkflow = map[ext] || 'markdown_based';
-                        form.workflow_type = newWorkflow;
-                        saveSetting('translator_last_workflow', newWorkflow);
+                        const newWorkflow = map[ext];
+                        if (newWorkflow) {
+                            form.workflow_type = newWorkflow;
+                            saveSetting('translator_last_workflow', newWorkflow);
+                        }
                     }
                 }
             };