diff --git a/src/main/java/com/example/cosmos_serversb/entities/Request.java b/src/main/java/com/example/cosmos_serversb/entities/Request.java
index e5ca799..7557139 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Request.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Request.java
@@ -44,7 +44,7 @@
         this.done = false;
     }
 
-    public void update(String uId, String product, String deadline, int location, boolean done){
+    public void update(String uId, String product, Date deadline, int location, boolean done){
         setIssuerUid(uId);
         setProduct(product);
         setDeadline(deadline);
@@ -97,11 +97,16 @@
     }
 
     public void setDeadline(Date deadline) {
+        if(deadline == null){
+            return;
+        }
         this.deadline = deadline;
     }
 
     public void setDeadline(String deadline) {
-        if(deadline == null) return;
+        if(deadline == null){
+            return;
+        }
         //String型をDate型に変換
         try {
             SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");