diff --git a/src/NMockaroo.Tests/NMockaroo.Tests.csproj b/src/NMockaroo.Tests/NMockaroo.Tests.csproj
index 81c95db..137759a 100644
--- a/src/NMockaroo.Tests/NMockaroo.Tests.csproj
+++ b/src/NMockaroo.Tests/NMockaroo.Tests.csproj
@@ -10,7 +10,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="3.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
-    <PackageReference Include="NUnit" Version="3.12.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="4.6.0" />
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.6.0" />