diff --git a/build/build.csproj b/build/build.csproj
index e061b305..ad7ed051 100644
--- a/build/build.csproj
+++ b/build/build.csproj
@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="Bullseye" Version="4.2.1" />
     <PackageReference Include="SimpleExec" Version="11.0.0" />
-    <PackageReference Include="System.Text.Json" Version="8.0.2" />
+    <PackageReference Include="System.Text.Json" Version="9.0.0" />
   </ItemGroup>
 
 </Project>