diff --git a/src/entity/summarizes.ts b/src/entity/summarizes.ts
index bd9fc65..c3be175 100644
--- a/src/entity/summarizes.ts
+++ b/src/entity/summarizes.ts
@@ -12,9 +12,8 @@ export class Summarize {
 
     @Column({
         nullable: true,
-        length: 256
     })
-    position_date: string;
+    position_date: Date;
 
     @Column({
         type: 'enum',