diff --git a/RedmineMailService/RedmineMailService.csproj b/RedmineMailService/RedmineMailService.csproj
index cefa5f3..b4a68db 100644
--- a/RedmineMailService/RedmineMailService.csproj
+++ b/RedmineMailService/RedmineMailService.csproj
@@ -20,7 +20,7 @@
     <PackageReference Include="Microsoft.SqlServer.SqlManagementObjects" Version="140.17283.0" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="4.5.0" />
     <PackageReference Include="MySqlConnector" Version="0.47.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="Npgsql" Version="4.0.3" />
     <PackageReference Include="System.Data.Common" Version="4.3.0" />
     <PackageReference Include="System.Data.SqlClient" Version="4.5.1" />