diff --git a/src/Punchclock.Tests/Punchclock.Tests.csproj b/src/Punchclock.Tests/Punchclock.Tests.csproj
index 8337857..7c43c16 100644
--- a/src/Punchclock.Tests/Punchclock.Tests.csproj
+++ b/src/Punchclock.Tests/Punchclock.Tests.csproj
@@ -17,7 +17,7 @@
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-		<PackageReference Include="DiffEngine" Version="15.5.5" />
+		<PackageReference Include="DiffEngine" Version="15.7.1" />
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