diff --git a/src/Migrations/20191110125455-create-user.js b/src/Migrations/20191110125455-create-user.js
index 19f8c58..48ad9af 100644
--- a/src/Migrations/20191110125455-create-user.js
+++ b/src/Migrations/20191110125455-create-user.js
@@ -13,7 +13,7 @@ module.exports = {
                 type: sequelize.STRING
             },
             hash_password: {
-                type: sequelize.STRING(128)
+                type: sequelize.STRING
             },
             createdAt: {
                 allowNull: false,
diff --git a/src/Migrations/20191224091606-create-node.js b/src/Migrations/20191224091606-create-node.js
index 5afdef4..6e5c72b 100644
--- a/src/Migrations/20191224091606-create-node.js
+++ b/src/Migrations/20191224091606-create-node.js
@@ -10,13 +10,13 @@ module.exports = {
                 type: sequelize.INTEGER
             },
             url: {
-                type: sequelize.STRING(128)
+                type: sequelize.STRING
             },
             token: {
-                type: sequelize.STRING(150)
+                type: sequelize.STRING
             },
             address: {
-                type: sequelize.STRING(128)
+                type: sequelize.STRING
             },
             userId: {
                 type: sequelize.INTEGER,
diff --git a/src/Migrations/20200129194920-create-general-miner-info.js b/src/Migrations/20200129194920-create-general-miner-info.js
index e829ba4..8348b93 100644
--- a/src/Migrations/20200129194920-create-general-miner-info.js
+++ b/src/Migrations/20200129194920-create-general-miner-info.js
@@ -10,7 +10,7 @@ module.exports = {
                 type: sequelize.INTEGER
             },
             version: {
-                type: sequelize.STRING(25)
+                type: sequelize.STRING
             },
             walletAddress: {
                 type: sequelize.STRING
diff --git a/src/Models/GeneralMinerInfo.ts b/src/Models/GeneralMinerInfo.ts
index d757b23..7a3b72a 100644
--- a/src/Models/GeneralMinerInfo.ts
+++ b/src/Models/GeneralMinerInfo.ts
@@ -14,7 +14,7 @@ export class GeneralMinerInfo extends Model {
     public static initialize(sequelize: Sequelize) {
         this.init({
             version: {
-                type: DataTypes.STRING(25),
+                type: DataTypes.STRING,
                 allowNull: false,
             },
             walletAddress: {
diff --git a/src/Models/Node.ts b/src/Models/Node.ts
index e84e8d7..11f326e 100644
--- a/src/Models/Node.ts
+++ b/src/Models/Node.ts
@@ -25,15 +25,15 @@ export class Node extends Model implements INode {
     public static initialize(sequelize: Sequelize) {
         this.init({
             url: {
-                type: DataTypes.STRING(128),
+                type: DataTypes.STRING,
                 allowNull: false,
             },
             token: {
-                type: DataTypes.STRING(150),
+                type: DataTypes.STRING,
                 allowNull: false,
             },
             address: {
-                type: DataTypes.STRING(128),
+                type: DataTypes.STRING,
                 allowNull: false,
             },
             name: {
diff --git a/src/Models/UserModel.ts b/src/Models/UserModel.ts
index 40b7eae..c00f67e 100644
--- a/src/Models/UserModel.ts
+++ b/src/Models/UserModel.ts
@@ -21,7 +21,7 @@ export class UserModel extends Model implements User {
             },
             // eslint-disable-next-line
             hash_password: {
-                type: DataTypes.STRING(128),
+                type: DataTypes.STRING,
                 allowNull: false,
             },
         } as ModelAttributes,