diff --git a/src/Senders/FluentEmail.MailKit/FluentEmail.MailKit.csproj b/src/Senders/FluentEmail.MailKit/FluentEmail.MailKit.csproj
index 2762de15..47e68e37 100644
--- a/src/Senders/FluentEmail.MailKit/FluentEmail.MailKit.csproj
+++ b/src/Senders/FluentEmail.MailKit/FluentEmail.MailKit.csproj
@@ -14,6 +14,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="MailKit" Version="2.10.1" />
+    <PackageReference Include="MailKit" Version="4.18.2" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/Senders/FluentEmail.Mailgun/FluentEmail.Mailgun.csproj b/src/Senders/FluentEmail.Mailgun/FluentEmail.Mailgun.csproj
index 2ad7eff6..b7b90544 100644
--- a/src/Senders/FluentEmail.Mailgun/FluentEmail.Mailgun.csproj
+++ b/src/Senders/FluentEmail.Mailgun/FluentEmail.Mailgun.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
   </ItemGroup>
 
   <ItemGroup>