diff --git a/dotnet/WebAutomation-Series/HeadlessTestsFirefox/HeadlessTestsFirefox.csproj b/dotnet/WebAutomation-Series/HeadlessTestsFirefox/HeadlessTestsFirefox.csproj
index 83017770..7fee9338 100644
--- a/dotnet/WebAutomation-Series/HeadlessTestsFirefox/HeadlessTestsFirefox.csproj
+++ b/dotnet/WebAutomation-Series/HeadlessTestsFirefox/HeadlessTestsFirefox.csproj
@@ -4,7 +4,7 @@
     <PackageReference Include="Selenium.Firefox.WebDriver" Version="*" />
     <PackageReference Include="Selenium.Support" Version="3.141.0" />
     <PackageReference Include="Selenium.WebDriver" Version="3.141.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="NUnit" Version="*" />