diff --git a/team1/src/main/java/com/example/demo/entity/Book_collectionEntity.java b/team1/src/main/java/com/example/demo/entity/Book_collectionEntity.java
index d85471e..8bda2d8 100644
--- a/team1/src/main/java/com/example/demo/entity/Book_collectionEntity.java
+++ b/team1/src/main/java/com/example/demo/entity/Book_collectionEntity.java
@@ -31,19 +31,19 @@ public class Book_collectionEntity {
 	private Integer idBook;
 	
 	//ISBN
-	@Column(name = "isbn", nullable = false)
+	@Column(name = "isbn", nullable = false, length = 13)
 	private String isBn;
 	
 	//書籍名
-	@Column(name = "nm_book", nullable = false)
+	@Column(name = "nm_book", nullable = false, length = 50)
     private String nmBook;
 	
 	//書籍名よみ
-	@Column(name = "kn_book", nullable = true)
+	@Column(name = "kn_book", nullable = true, length = 100)
     private String knBook;
 	
 	//出版社
-	@Column(name = "publisher", nullable = true)
+	@Column(name = "publisher", nullable = true, length = 50)
     private String pubLisher;
 	
 	//特記事項