diff --git a/src/OpenFeature.Contrib.Providers.Flagsmith/OpenFeature.Contrib.Providers.Flagsmith.csproj b/src/OpenFeature.Contrib.Providers.Flagsmith/OpenFeature.Contrib.Providers.Flagsmith.csproj
index bafccde4..02b35230 100644
--- a/src/OpenFeature.Contrib.Providers.Flagsmith/OpenFeature.Contrib.Providers.Flagsmith.csproj
+++ b/src/OpenFeature.Contrib.Providers.Flagsmith/OpenFeature.Contrib.Providers.Flagsmith.csproj
@@ -21,7 +21,7 @@
     <PackageReference Include="Flagsmith" Version="5.3.0" />
   </ItemGroup>
 
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0'">
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'net5.0'">
     <PackageReference Include="System.Text.Json" Version="8.0.3" />
   </ItemGroup>