diff --git a/tests/Invisionware.Serialization.JsonNet.Tests/Invisionware.Serialization.JsonNet.Tests.csproj b/tests/Invisionware.Serialization.JsonNet.Tests/Invisionware.Serialization.JsonNet.Tests.csproj
index 1657501..f56835f 100644
--- a/tests/Invisionware.Serialization.JsonNet.Tests/Invisionware.Serialization.JsonNet.Tests.csproj
+++ b/tests/Invisionware.Serialization.JsonNet.Tests/Invisionware.Serialization.JsonNet.Tests.csproj
@@ -11,7 +11,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="FluentAssertions" Version="5.10.2" />
-		<PackageReference Include="nunit" Version="3.12.0" />
+		<PackageReference Include="nunit" Version="3.13.0" />
 		<PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
 		<PackageReference Include="Serilog" Version="2.9.0" />
diff --git a/tests/Invisionware.Serialization.NetCore.Tests/Invisionware.Serialization.NetCore.Tests.csproj b/tests/Invisionware.Serialization.NetCore.Tests/Invisionware.Serialization.NetCore.Tests.csproj
index 7da1217..c8d6593 100644
--- a/tests/Invisionware.Serialization.NetCore.Tests/Invisionware.Serialization.NetCore.Tests.csproj
+++ b/tests/Invisionware.Serialization.NetCore.Tests/Invisionware.Serialization.NetCore.Tests.csproj
@@ -11,7 +11,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="FluentAssertions" Version="5.10.2" />
-		<PackageReference Include="nunit" Version="3.12.0" />
+		<PackageReference Include="nunit" Version="3.13.0" />
 		<PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
 		<PackageReference Include="Serilog" Version="2.9.0" />
diff --git a/tests/Invisionware.Serialization.Tests/Invisionware.Serialization.Tests.csproj b/tests/Invisionware.Serialization.Tests/Invisionware.Serialization.Tests.csproj
index ea6b0c4..82631be 100644
--- a/tests/Invisionware.Serialization.Tests/Invisionware.Serialization.Tests.csproj
+++ b/tests/Invisionware.Serialization.Tests/Invisionware.Serialization.Tests.csproj
@@ -12,7 +12,7 @@
 	<ItemGroup>
 		<PackageReference Include="FluentAssertions" Version="5.10.2" />
 		<PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-		<PackageReference Include="nunit" Version="3.12.0" />
+		<PackageReference Include="nunit" Version="3.13.0" />
 		<PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
 		<PackageReference Include="Serilog" Version="2.9.0" />
diff --git a/tests/Invisionware.Serialization.Tests/packages.config b/tests/Invisionware.Serialization.Tests/packages.config
index a6b328a..e4fa57e 100644
--- a/tests/Invisionware.Serialization.Tests/packages.config
+++ b/tests/Invisionware.Serialization.Tests/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Newtonsoft.Json" version="12.0.3" targetFramework="net45" />
-  <package id="NUnit" version="3.12.0" targetFramework="net45" />
+  <package id="NUnit" version="3.13.0" targetFramework="net45" />
 </packages>
\ No newline at end of file