diff --git a/src/EpiEvents.Core.Tests/packages.config b/src/EpiEvents.Core.Tests/packages.config
index 4a1cc12..30f1399 100644
--- a/src/EpiEvents.Core.Tests/packages.config
+++ b/src/EpiEvents.Core.Tests/packages.config
@@ -18,7 +18,7 @@
   <package id="Microsoft.Net.Compilers" version="2.7.0" targetFramework="net461" developmentDependency="true" />
   <package id="Microsoft.Tpl.Dataflow" version="4.5.24" targetFramework="net461" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net461" />
   <package id="Optional" version="4.0.0" targetFramework="net461" />
   <package id="System.ComponentModel.Annotations" version="4.4.0" targetFramework="net461" />
   <package id="System.Data.SqlClient" version="4.4.0" targetFramework="net461" />