diff --git a/modeler/src/views/decision/designer.vue b/modeler/src/views/decision/designer.vue
index 726eceb..dfd3f39 100644
--- a/modeler/src/views/decision/designer.vue
+++ b/modeler/src/views/decision/designer.vue
@@ -110,7 +110,7 @@ export default defineComponent({
     const selectedModelNode = ref<Node<NodeProperties> | null>(null);
     const selectedNodeTaskElement = ref<GraphTaskElement | null>(null);
     const changed = ref<boolean>(false);
-    const treesCardRef = ref<HTMLElement|null>(null);
+    const treesCardRef = ref<InstanceType<typeof TressCard> | null>(null);
 
     const {
       handleGraphEvent,