diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Animation.java b/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
index c5a212c..e40cb2e 100644
--- a/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
@@ -17,11 +17,11 @@
     private String lastUpdate;
     private Integer likes;
     private Integer views;
-    private ArrayList<String> hashTag;
+    private ArrayList<String> hashTag = new ArrayList<>();
     private Account owner;
-    private ArrayList<Editor> editors;
-    private ArrayList<Account> invites;
-    private HashMap<Integer,Integer> pageMap;
+    private ArrayList<Editor> editors = new ArrayList<>();
+    private ArrayList<Account> invites = new ArrayList<>();
+    private HashMap<Integer,Integer> pageMap = new HashMap<>();
 
     public Animation(Integer aid, String name, Account owner) {
         this.aid = aid;