diff --git a/MarkupString.Tests/MarkupString.Tests.csproj b/MarkupString.Tests/MarkupString.Tests.csproj
index 9c10fe0..aa858d5 100644
--- a/MarkupString.Tests/MarkupString.Tests.csproj
+++ b/MarkupString.Tests/MarkupString.Tests.csproj
@@ -9,10 +9,10 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="CsCheck" Version="5.0.0" />
-    <PackageReference Include="TUnit" Version="1.76.28" />
+    <PackageReference Include="TUnit" Version="1.78.0" />
     <!-- A GitHub-flavoured Markdown reader, so the Markdown tests check what a reader makes of the output
          rather than only the characters written. -->
-    <PackageReference Include="Markdig" Version="1.5.0" />
+    <PackageReference Include="Markdig" Version="1.5.1" />
     <!-- Verify.TUnit carries a floor on TUnit.Core. Bump the two together: if NuGet lifts
          TUnit.Core past the TUnit.Engine this project asks for, the split versions fault at
          startup with MissingFieldException rather than failing to restore. -->