diff --git a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/SimpleIdentityServer.Client.csproj b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/SimpleIdentityServer.Client.csproj
index fb956412b..47b22139f 100644
--- a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/SimpleIdentityServer.Client.csproj
+++ b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/SimpleIdentityServer.Client.csproj
@@ -23,7 +23,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.1.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="HtmlAgilityPack.NetCore" Version="1.5.0.1" />
   </ItemGroup>
 
diff --git a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/packages.config b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/packages.config
index db9c81088..ef8230411 100644
--- a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/packages.config
+++ b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Client/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
 </packages>
\ No newline at end of file
diff --git a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Core.Common/SimpleIdentityServer.Core.Common.csproj b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Core.Common/SimpleIdentityServer.Core.Common.csproj
index eabc4b569..5116e15ec 100644
--- a/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Core.Common/SimpleIdentityServer.Core.Common.csproj
+++ b/SimpleIdentityServer/src/Apis/SimpleIdServer/SimpleIdentityServer.Core.Common/SimpleIdentityServer.Core.Common.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="2.1.0" />
     <PackageReference Include="System.Security.Cryptography.OpenSsl" Version="4.4.0" />
   </ItemGroup>