diff --git a/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj b/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
index cbd1d2ce..9f14b922 100644
--- a/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
+++ b/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
@@ -12,7 +12,7 @@
   </PropertyGroup>
     
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="CSF.Entities" Version="2.0.3" />
     <PackageReference Include="CSF.Security" Version="2.0.2" />
     <PackageReference Include="CSF.Utils" Version="6.1.1" />
diff --git a/Agiil.Auth/Agiil.Auth.csproj b/Agiil.Auth/Agiil.Auth.csproj
index eb83690a..5d43f7d2 100644
--- a/Agiil.Auth/Agiil.Auth.csproj
+++ b/Agiil.Auth/Agiil.Auth.csproj
@@ -12,7 +12,7 @@
   </PropertyGroup>
     
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="CSF.Entities" Version="2.0.3" />
     <PackageReference Include="CSF.Security" Version="2.0.2" />
   </ItemGroup>
diff --git a/Agiil.Bootstrap/Agiil.Bootstrap.csproj b/Agiil.Bootstrap/Agiil.Bootstrap.csproj
index d580fb8f..77251ab0 100644
--- a/Agiil.Bootstrap/Agiil.Bootstrap.csproj
+++ b/Agiil.Bootstrap/Agiil.Bootstrap.csproj
@@ -20,7 +20,7 @@
     <PackageReference Include="Microsoft.Owin.Security" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Security.Cookies" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Host.SystemWeb" Version="3.0.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="AutoMapper" Version="6.0.2" />
     <PackageReference Include="CSF.Configuration" Version="1.1.2" />
     <PackageReference Include="CSF.Entities" Version="2.0.3" />
diff --git a/Agiil.Data/Agiil.Data.csproj b/Agiil.Data/Agiil.Data.csproj
index 41be4c27..4e169a31 100644
--- a/Agiil.Data/Agiil.Data.csproj
+++ b/Agiil.Data/Agiil.Data.csproj
@@ -29,7 +29,7 @@
     <PackageReference Include="AutoMapper" Version="6.0.2" />
     <PackageReference Include="Mono.Data.Sqlite" Version="1.0.61" />
     <PackageReference Include="System.Data.SQLite" Version="1.0.105.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <!-- The following two packages are conditional on whether we are building on Windows or Linux/Mono.
          Actually, I don't think it should be the build which determines this; it should be decided at runtime. -->
     <PackageReference Include="dbup-sqlite" Condition="'$(OS)' == 'Windows_NT'" Version="3.3.5" />
diff --git a/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj b/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
index b955bc30..0b109a62 100644
--- a/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
+++ b/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
@@ -19,7 +19,7 @@
     <PackageReference Include="Microsoft.Owin.Security" Version="3.0.1" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="4.0.0" />
     <PackageReference Include="Microsoft.Owin.Security.OAuth" Version="3.0.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.Owin.Security.Jwt" Version="3.0.1" />
   </ItemGroup>
     
diff --git a/Agiil.Web/packages.config b/Agiil.Web/packages.config
index cdbc10a8..2e8dc2aa 100644
--- a/Agiil.Web/packages.config
+++ b/Agiil.Web/packages.config
@@ -53,7 +53,7 @@
   <package id="Microsoft.Owin.Security.OAuth" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.VisualStudio.SlowCheetah" version="3.0.61" targetFramework="net45" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net471" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net471" />
   <package id="NHibernate" version="4.0.0.4000" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
   <package id="Owin.Security.AesDataProtectorProvider" version="1.1.0.0" targetFramework="net45" />