diff --git a/source/Octostache.Tests/Octostache.Tests.csproj b/source/Octostache.Tests/Octostache.Tests.csproj
index 4e2b055..7eb8341 100644
--- a/source/Octostache.Tests/Octostache.Tests.csproj
+++ b/source/Octostache.Tests/Octostache.Tests.csproj
@@ -21,7 +21,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="FluentAssertions" Version="4.19.2" />
+        <PackageReference Include="FluentAssertions" Version="6.7.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
         <PackageReference Include="Sprache" Version="2.3.1" />