diff --git a/src/Obj23dTiles/Obj23dTiles.csproj b/src/Obj23dTiles/Obj23dTiles.csproj
index 75a2056..242da81 100644
--- a/src/Obj23dTiles/Obj23dTiles.csproj
+++ b/src/Obj23dTiles/Obj23dTiles.csproj
@@ -31,7 +31,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Obj2Gltf/Obj2Gltf.csproj b/src/Obj2Gltf/Obj2Gltf.csproj
index ad580d1..5af4a96 100644
--- a/src/Obj2Gltf/Obj2Gltf.csproj
+++ b/src/Obj2Gltf/Obj2Gltf.csproj
@@ -33,7 +33,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
 </Project>