diff --git a/src/components/collapse/panel.vue b/src/components/collapse/panel.vue
index de0df42f..d284b4e4 100644
--- a/src/components/collapse/panel.vue
+++ b/src/components/collapse/panel.vue
@@ -64,6 +64,7 @@
         },
         mounted () {
             this.mounted = true;
+            this.$parent.setActive();
         }
     };
 </script>