how can i change the column CorporateID datatype it is a foreign key

CREATE TABLE [dbo].[tblVehicleCategory](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [CategoryName] [nvarchar](50) NULL,
    [NumberOfSeats] [int] NOT NULL,
    [Description] [nvarchar](max) NULL,
    [CorporateID] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_tblVehicleCategory] PRIMARY KEY CLUSTERED
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[tblVehicleCategory]  WITH CHECK ADD FOREIGN KEY([CorporateID])
REFERENCES [dbo].[tblCorporateProfile] ([CorporateID])
GO