diff --git a/MimeKit/MimeKit.csproj b/MimeKit/MimeKit.csproj
index 8f68f7dfcb..eb29731097 100644
--- a/MimeKit/MimeKit.csproj
+++ b/MimeKit/MimeKit.csproj
@@ -46,14 +46,14 @@
   </PropertyGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('netstandard1.')) ">
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Globalization.Extensions" Version="4.3.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.4.0" />
     <PackageReference Include="System.Data.Common" Version="4.3.0" />
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('netstandard2.')) ">
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.4.0" />
     <PackageReference Include="System.Security.Cryptography.Pkcs" Version="4.7.0" />
   </ItemGroup>
@@ -70,7 +70,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('net5')) ">
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.4.0" />
     <PackageReference Include="System.Security.Cryptography.Pkcs" Version="4.7.0" />
   </ItemGroup>
diff --git a/MimeKit/MimeKitLite.csproj b/MimeKit/MimeKitLite.csproj
index 48d6e3d740..dbf294052e 100644
--- a/MimeKit/MimeKitLite.csproj
+++ b/MimeKit/MimeKitLite.csproj
@@ -45,12 +45,12 @@
   </PropertyGroup>
    
   <ItemGroup Condition=" $(TargetFramework.StartsWith('netstandard2.0')) ">
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.4.0" />
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('net5')) ">
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.4.0" />
   </ItemGroup>