diff --git a/Package.resolved b/Package.resolved
deleted file mode 100644
index eb703a0..0000000
--- a/Package.resolved
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "originHash" : "83da2b52618699fd2dcd60ee4af8cc30370871f48fec6964f6852050c8e2998f",
-  "pins" : [
-    {
-      "identity" : "swift-log",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-log",
-      "state" : {
-        "revision" : "bc386b95f2a16ccd0150a8235e7c69eab2b866ca",
-        "version" : "1.8.0"
-      }
-    }
-  ],
-  "version" : 3
-}
diff --git a/Package.swift b/Package.swift
index 8dc22a6..bf3a49f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -11,7 +11,7 @@ var defaultSwiftSettings: [SwiftSetting] = [
     // https://forums.swift.org/t/experimental-support-for-lifetime-dependencies-in-swift-6-2-and-beyond/78638
     .enableExperimentalFeature("Lifetimes"),
     // https://github.com/swiftlang/swift/pull/65218
-    .enableExperimentalFeature("AvailabilityMacro=FeatherMailAvailability:macOS 15, iOS 18, watchOS 9, tvOS 11, visionOS 2"),
+    .enableExperimentalFeature("AvailabilityMacro=featherMail:macOS 15, iOS 18, watchOS 9, tvOS 11, visionOS 2"),
 ]
 
 #if compiler(>=6.2)
@@ -28,15 +28,13 @@ let package = Package(
     ],
     dependencies: [
         // [docc-plugin-placeholder]
-        .package(url: "https://github.com/apple/swift-log", from: "1.6.0"),
     ],
     
     targets: [
         .target(
             name: "FeatherMail",
-            dependencies: [
-                .product(name: "Logging", package: "swift-log"),
-            ]
+            dependencies: [],
+            swiftSettings: defaultSwiftSettings
         ),
         .testTarget(
             name: "FeatherMailTests",
@@ -45,7 +43,8 @@ let package = Package(
             ],
             resources: [
                 .copy("Assets/feather.png")
-            ]
+            ],
+            swiftSettings: defaultSwiftSettings
         ),
     ],
     
diff --git a/Tests/FeatherMailTests/RawMailEncoderTests.swift b/Tests/FeatherMailTests/RawMailEncoderTests.swift
index 868dff2..e67b134 100644
--- a/Tests/FeatherMailTests/RawMailEncoderTests.swift
+++ b/Tests/FeatherMailTests/RawMailEncoderTests.swift
@@ -5,6 +5,7 @@
 //  Created by Binary Birds on 2026. 01. 26..
 //
 
+import Foundation
 import Testing
 @testable import FeatherMail