diff --git a/Fakemail.Core/Fakemail.Core.csproj b/Fakemail.Core/Fakemail.Core.csproj
index 6966d6e..5247b80 100644
--- a/Fakemail.Core/Fakemail.Core.csproj
+++ b/Fakemail.Core/Fakemail.Core.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.0" />
-    <PackageReference Include="MimeKit" Version="4.7.1" />
+    <PackageReference Include="MimeKit" Version="4.15.1" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.6.3" />
   </ItemGroup>
 
diff --git a/Fakemail.Services.Tests/Fakemail.Services.Tests.csproj b/Fakemail.Services.Tests/Fakemail.Services.Tests.csproj
index 9525d04..fd1a08e 100644
--- a/Fakemail.Services.Tests/Fakemail.Services.Tests.csproj
+++ b/Fakemail.Services.Tests/Fakemail.Services.Tests.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="MimeKit" Version="4.7.1" />
+    <PackageReference Include="MimeKit" Version="4.15.1" />
     <PackageReference Include="xunit" Version="2.9.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>