diff --git a/src/ApprovalTests/ApprovalTests.csproj b/src/ApprovalTests/ApprovalTests.csproj
index 14a60b80..8656a8be 100644
--- a/src/ApprovalTests/ApprovalTests.csproj
+++ b/src/ApprovalTests/ApprovalTests.csproj
@@ -11,7 +11,7 @@
     <Using Remove="System.Net.Http" />
     <PackageReference Include="Polyfill" Version="1.32.1" PrivateAssets="all" />
     <Compile Include="..\ApprovalUtilities\InternalsVisibleTo.cs" Link="InternalsVisibleTo.cs" />
-    <PackageReference Include="DiffEngine" Version="12.4.2" />
+    <PackageReference Include="DiffEngine" Version="13.0.0" />
     <PackageReference Include="EmptyFiles" Version="4.6.0" PrivateAssets="None" />
     <PackageReference Include="Fody" Version="6.8.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />