diff --git a/src/Postmark/Postmark.csproj b/src/Postmark/Postmark.csproj
index 0441453..ed74c5e 100644
--- a/src/Postmark/Postmark.csproj
+++ b/src/Postmark/Postmark.csproj
@@ -15,6 +15,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
-    <PackageReference Include="System.Text.Json" Version="8.0.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 </Project>
\ No newline at end of file