diff --git a/src/Horarium/Horarium.csproj b/src/Horarium/Horarium.csproj
index ca8868d..c72dc12 100644
--- a/src/Horarium/Horarium.csproj
+++ b/src/Horarium/Horarium.csproj
@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="Cronos" Version="0.6.3" />
     <PackageReference Include="Microsoft.CSharp" Version="4.3.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="System.ValueTuple" Version="4.3.0" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net46'">