diff --git a/zzio.tests/zzio.tests.csproj b/zzio.tests/zzio.tests.csproj
index c4f9cbc1..3b3fe46a 100644
--- a/zzio.tests/zzio.tests.csproj
+++ b/zzio.tests/zzio.tests.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="nunit" Version="4.2.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
   </ItemGroup>