diff --git a/src/Fdc3.Json/Finos.Fdc3.Json.csproj b/src/Fdc3.Json/Finos.Fdc3.Json.csproj
index f512119..6f4d7f8 100644
--- a/src/Fdc3.Json/Finos.Fdc3.Json.csproj
+++ b/src/Fdc3.Json/Finos.Fdc3.Json.csproj
@@ -35,7 +35,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="System.Text.Json" Version="8.0.5" />
+        <PackageReference Include="System.Text.Json" Version="9.0.0" />
     </ItemGroup>
 
     <ItemGroup>