diff --git a/src/WireMock.Net/WireMock.Net.csproj b/src/WireMock.Net/WireMock.Net.csproj
index 8579cdf6..d54d5538 100644
--- a/src/WireMock.Net/WireMock.Net.csproj
+++ b/src/WireMock.Net/WireMock.Net.csproj
@@ -70,7 +70,7 @@
         <PackageReference Include="SimMetrics.Net" Version="1.0.5" />
         <PackageReference Include="JmesPath.Net" Version="1.0.330" />
         <PackageReference Include="AnyOf" Version="0.4.0" />
-        <PackageReference Include="TinyMapper" Version="3.0.3" />
+        <PackageReference Include="TinyMapper.Signed" Version="4.0.0" />
     </ItemGroup>
 
     <ItemGroup Condition=" '$(TargetFramework)' != 'netstandard1.3' ">