diff --git a/SystemExtensions.DependencyInjection.Tests/Configuration/UpdateableOptionsWrapperTests.cs b/SystemExtensions.DependencyInjection.Tests/Configuration/UpdateableOptionsWrapperTests.cs
index af3c43a..6db1642 100644
--- a/SystemExtensions.DependencyInjection.Tests/Configuration/UpdateableOptionsWrapperTests.cs
+++ b/SystemExtensions.DependencyInjection.Tests/Configuration/UpdateableOptionsWrapperTests.cs
@@ -3,6 +3,7 @@ using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Moq;
 using System;
 using System.Configuration;
+using System.Extensions.Configuration;
 
 namespace SystemExtensions.DependencyInjection.Tests.Configuration
 {
diff --git a/SystemExtensions.NetStandard.DependencyInjection/Configuration/UpdateableOptionsResolver.cs b/SystemExtensions.NetStandard.DependencyInjection/Configuration/UpdateableOptionsResolver.cs
index 37d2f86..aa5236f 100644
--- a/SystemExtensions.NetStandard.DependencyInjection/Configuration/UpdateableOptionsResolver.cs
+++ b/SystemExtensions.NetStandard.DependencyInjection/Configuration/UpdateableOptionsResolver.cs
@@ -1,4 +1,5 @@
 using Slim.Resolvers;
+using System.Extensions.Configuration;
 
 namespace System.Configuration
 {