diff --git a/test/Microsoft.VisualStudio.Validation.Tests/Microsoft.VisualStudio.Validation.Tests.csproj b/test/Microsoft.VisualStudio.Validation.Tests/Microsoft.VisualStudio.Validation.Tests.csproj
index 4b7d681f..5a0aaa19 100644
--- a/test/Microsoft.VisualStudio.Validation.Tests/Microsoft.VisualStudio.Validation.Tests.csproj
+++ b/test/Microsoft.VisualStudio.Validation.Tests/Microsoft.VisualStudio.Validation.Tests.csproj
@@ -3,7 +3,7 @@
     <TargetFrameworks>net472;netcoreapp3.1;net5.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Moq" Version="4.16.1" />
+    <PackageReference Include="Moq" Version="4.18.1" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />