diff --git a/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj b/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
index cbd1d2ce..95b6ce5f 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="13.0.2" />
     <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..87823823 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="13.0.2" />
     <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..5ea6369f 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="13.0.2" />
     <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..8776c116 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="13.0.2" />
     <!-- 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..e7e9fb39 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="13.0.2" />
     <PackageReference Include="Microsoft.Owin.Security.Jwt" Version="3.0.1" />
   </ItemGroup>
     
diff --git a/Tests/Agiil.BDD/Agiil.BDD.csproj b/Tests/Agiil.BDD/Agiil.BDD.csproj
index 09f05e2a..e3aa3a32 100644
--- a/Tests/Agiil.BDD/Agiil.BDD.csproj
+++ b/Tests/Agiil.BDD/Agiil.BDD.csproj
@@ -22,7 +22,7 @@
     <PackageReference Include="Selenium.Support" Version="3.4.0" />
     <PackageReference Include="FluentAssertions" Version="4.19.3" />
     <PackageReference Include="SpecFlow" Version="2.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="CSF.Configuration" Version="1.1.2" />
     <PackageReference Include="CSF.FlexDi" Version="1.0.2" />
     <PackageReference Include="CSF.Utils" Version="6.1.1" />
diff --git a/Tests/Agiil.Tests.Common/Agiil.Tests.Common.csproj b/Tests/Agiil.Tests.Common/Agiil.Tests.Common.csproj
index bb79b878..93cad020 100644
--- a/Tests/Agiil.Tests.Common/Agiil.Tests.Common.csproj
+++ b/Tests/Agiil.Tests.Common/Agiil.Tests.Common.csproj
@@ -34,7 +34,7 @@
       <PackageReference Include="Iesi.Collections" Version="4.0.0.4000" />
       <PackageReference Include="log4net" Version="2.0.8" />
       <PackageReference Include="Moq" Version="4.14.5" />
-      <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+      <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
       <PackageReference Include="NHibernate" Version="4.0.0.4000" />
       <PackageReference Include="NUnit" Version="3.7.1" />
       <PackageReference Include="NUnit.ConsoleRunner" Version="3.7.0" />
diff --git a/Tests/Agiil.Web.TestBuild/Agiil.Web.TestBuild.csproj b/Tests/Agiil.Web.TestBuild/Agiil.Web.TestBuild.csproj
index c9524262..6c13181f 100644
--- a/Tests/Agiil.Web.TestBuild/Agiil.Web.TestBuild.csproj
+++ b/Tests/Agiil.Web.TestBuild/Agiil.Web.TestBuild.csproj
@@ -36,7 +36,7 @@
       <PackageReference Include="CSF.Specifications" Version="2.0.0" />
       <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.3" />
       <PackageReference Include="Microsoft.AspNet.WebApi.Core" Version="5.2.3" />
-      <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+      <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
       <PackageReference Include="CSF.ReflectionSpecifications" Version="3.0.0" />
   </ItemGroup>