diff --git a/src/FluentEmail.Graph/FluentEmail.Graph.csproj b/src/FluentEmail.Graph/FluentEmail.Graph.csproj
index 795e4a7..f45b610 100644
--- a/src/FluentEmail.Graph/FluentEmail.Graph.csproj
+++ b/src/FluentEmail.Graph/FluentEmail.Graph.csproj
@@ -15,13 +15,14 @@
         <PublishRepositoryUrl>true</PublishRepositoryUrl>
         <EmbedUntrackedSources>true</EmbedUntrackedSources>
         <DebugType>embedded</DebugType>
-        <LangVersion>latest</LangVersion>
+        <LangVersion>default</LangVersion>
         <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
         <Version>0.0.1</Version>
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <MinVerVerbosity>detailed</MinVerVerbosity>
-        <MinVerMinimumMajorMinor>3.0</MinVerMinimumMajorMinor>
-        <PackageReleaseNotes>v3.0 Updated all dependencies and upgraded test projects to .NET 10
+        <MinVerMinimumMajorMinor>4.0</MinVerMinimumMajorMinor>
+        <PackageReleaseNotes>v4.0 Updated Microsoft.Graph to v6
+v3.0 Updated all dependencies and upgraded test projects to .NET 10
 v2.4 Updated Microsoft.Graph to v5
 v2.2 Added support for Headers
 v2.1 Added support for Inline images
@@ -50,7 +51,7 @@ v2.1 Added support for Inline images
         <PackageReference Include="JetBrains.Annotations" Version="2026.2.0">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.Graph" Version="5.101.0" />
+        <PackageReference Include="Microsoft.Graph" Version="6.2.0" />
         <PackageReference Include="MinVer" Version="7.0.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>