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Entity Framework Core - The EF Core tools version '2.1.1-rtm-30846' is older than that of the runtime '2.1.4-rtm-31024'.

When trying to create my initial migration using EF Core, I got the following error message:

Add-Migration InitialCreate

The EF Core tools version '2.1.1-rtm-30846' is older than that of the runtime '2.1.4-rtm-31024'. Update the tools for the latest features and bug fixes.

System.IO.FileLoadException: Could not load file or assembly 'Microsoft.EntityFrameworkCore.Relational, Version=2.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

File name: 'Microsoft.EntityFrameworkCore.Relational, Version=2.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'

   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c.<FindContextTypes>b__12_4(TypeInfo t)

   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()

   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()

   at System.Linq.Enumerable.ConcatIterator`1.MoveNext()

   at System.Linq.Enumerable.DistinctIterator`1.MoveNext()

   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()

   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextTypes()

   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextType(String name)

   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType)

   at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType)

   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType)

   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_1.<.ctor>b__0()

   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()

   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)

Could not load file or assembly 'Microsoft.EntityFrameworkCore.Relational, Version=2.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

At least this error message points me in the right direction. I opened up the Package Manager console and updated the Microsoft.EntityFrameworkCore.Tools nuget package:

Install-Package Microsoft.EntityFrameworkCore.Tools -Version 2.1.4

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