diff --git a/src/api/Nhs.Appointments.Core/Nhs.Appointments.Core.csproj b/src/api/Nhs.Appointments.Core/Nhs.Appointments.Core.csproj
index 5e8f8571d..408cc782d 100644
--- a/src/api/Nhs.Appointments.Core/Nhs.Appointments.Core.csproj
+++ b/src/api/Nhs.Appointments.Core/Nhs.Appointments.Core.csproj
@@ -22,7 +22,7 @@
 		<PackageReference Include="Microsoft.FeatureManagement.AspNetCore" Version="4.1.0" />
 		<PackageReference Include="Polly" Version="8.5.2" />
     <PackageReference Include="Okta.Sdk" Version="9.2.3" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
 	</ItemGroup>
 
 	<ItemGroup>
diff --git a/src/api/Nhs.Appointments.Persistance/Nhs.Appointments.Persistance.csproj b/src/api/Nhs.Appointments.Persistance/Nhs.Appointments.Persistance.csproj
index 9562279b8..6e60dd3e7 100644
--- a/src/api/Nhs.Appointments.Persistance/Nhs.Appointments.Persistance.csproj
+++ b/src/api/Nhs.Appointments.Persistance/Nhs.Appointments.Persistance.csproj
@@ -24,6 +24,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
     <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
       <_Parameter1>Nhs.Appointments.Persistance.UnitTests</_Parameter1>
     </AssemblyAttribute>