diff --git a/src/Ptncafe.GraphQLTest.Api/Ptncafe.GraphQLTest.Api.csproj b/src/Ptncafe.GraphQLTest.Api/Ptncafe.GraphQLTest.Api.csproj
index 853304a..819c0af 100644
--- a/src/Ptncafe.GraphQLTest.Api/Ptncafe.GraphQLTest.Api.csproj
+++ b/src/Ptncafe.GraphQLTest.Api/Ptncafe.GraphQLTest.Api.csproj
@@ -13,7 +13,7 @@
     <PackageReference Include="GraphQL.Server.Ui.Playground" Version="3.4.0" />
     <PackageReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Ptncafe.GraphQLTest.Proxy/Ptncafe.GraphQLTest.Proxy.csproj b/src/Ptncafe.GraphQLTest.Proxy/Ptncafe.GraphQLTest.Proxy.csproj
index 6da2999..1cfdee3 100644
--- a/src/Ptncafe.GraphQLTest.Proxy/Ptncafe.GraphQLTest.Proxy.csproj
+++ b/src/Ptncafe.GraphQLTest.Proxy/Ptncafe.GraphQLTest.Proxy.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7" />
     <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>