diff --git a/src/renderer/components/TimelineSpace/SideMenu.vue b/src/renderer/components/TimelineSpace/SideMenu.vue
index 33e9c786..d77109c8 100644
--- a/src/renderer/components/TimelineSpace/SideMenu.vue
+++ b/src/renderer/components/TimelineSpace/SideMenu.vue
@@ -16,7 +16,7 @@
             </el-dropdown-menu>
           </el-dropdown>
         </div>
-        <span>{{ account.domain }}</span>
+        <span class="domain-name">{{ account.domain }}</span>
       </div>
       <div class="collapse">
         <el-button type="text" class="release-collapse" @click="releaseCollapse" v-if="collapse" :title="$t('side_menu.expand')">
@@ -168,6 +168,11 @@ export default {
       .el-dropdown-link {
         cursor: pointer;
       }
+
+      .domain-name {
+        word-break: break-all;
+        white-space: nowrap;
+      }
     }
 
     .profile-narrow {