diff --git a/Quill.Delta.Test/Quill.Delta.Test.csproj b/Quill.Delta.Test/Quill.Delta.Test.csproj
index c9a84d1..799c877 100644
--- a/Quill.Delta.Test/Quill.Delta.Test.csproj
+++ b/Quill.Delta.Test/Quill.Delta.Test.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="5.4.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="NUnit" Version="3.11.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
   </ItemGroup>
diff --git a/Quill.Delta/Quill.Delta.csproj b/Quill.Delta/Quill.Delta.csproj
index cd003ab..dbb53e6 100644
--- a/Quill.Delta/Quill.Delta.csproj
+++ b/Quill.Delta/Quill.Delta.csproj
@@ -32,7 +32,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 
   <ItemGroup>