diff --git a/ontime-back/src/main/java/devkor/ontime_back/entity/User.java b/ontime-back/src/main/java/devkor/ontime_back/entity/User.java
index 8993fcf..ac91e3d 100644
--- a/ontime-back/src/main/java/devkor/ontime_back/entity/User.java
+++ b/ontime-back/src/main/java/devkor/ontime_back/entity/User.java
@@ -48,8 +48,10 @@ public class User {
 
     private String socialId; // 로그인한 소셜 타입의 식별자 값 (일반 로그인인 경우 null)
 
+    @Lob
     private String accessToken; // accessToken
 
+    @Lob
     private String refreshToken; // refreshToken
 
     private String firebaseToken;
diff --git a/ontime-back/src/main/resources/db/migration/V5__change_field_accesstoken_length.sql b/ontime-back/src/main/resources/db/migration/V5__change_field_accesstoken_length.sql
new file mode 100644
index 0000000..00a77d3
--- /dev/null
+++ b/ontime-back/src/main/resources/db/migration/V5__change_field_accesstoken_length.sql
@@ -0,0 +1,2 @@
+ALTER TABLE user
+    MODIFY COLUMN access_token TEXT;
\ No newline at end of file
diff --git a/ontime-back/src/main/resources/db/migration/V6__change_filed_accesstoken_longtext.sql b/ontime-back/src/main/resources/db/migration/V6__change_filed_accesstoken_longtext.sql
new file mode 100644
index 0000000..35cd71f
--- /dev/null
+++ b/ontime-back/src/main/resources/db/migration/V6__change_filed_accesstoken_longtext.sql
@@ -0,0 +1,2 @@
+ALTER TABLE `user`
+  MODIFY COLUMN `access_token` LONGTEXT;
\ No newline at end of file
diff --git a/ontime-back/src/main/resources/db/migration/V7__change_filed_accesstoken_refreshtoken.sql b/ontime-back/src/main/resources/db/migration/V7__change_filed_accesstoken_refreshtoken.sql
new file mode 100644
index 0000000..18d413f
--- /dev/null
+++ b/ontime-back/src/main/resources/db/migration/V7__change_filed_accesstoken_refreshtoken.sql
@@ -0,0 +1,3 @@
+ALTER TABLE `user`
+  MODIFY COLUMN `access_token` LONGTEXT NULL,
+  MODIFY COLUMN `refresh_token` LONGTEXT NULL;
\ No newline at end of file