diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/edit/WorkListViewAdapter.java b/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/edit/WorkListViewAdapter.java
index e8c7497..a9da4e1 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/edit/WorkListViewAdapter.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/edit/WorkListViewAdapter.java
@@ -16,8 +16,8 @@
     private final LayoutInflater inflater;
     private final int layoutId;
 
-    private ArrayList<String> animationNameList;
-    private ArrayList<String> lastUpdateList;
+    private ArrayList<String> animationNameList = new ArrayList<>();
+    private ArrayList<String> lastUpdateList = new ArrayList<>();
 
     //参照保存データ
     static class ViewHolder {