diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index edd2f1c..5334233 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
   test-on-macos:
     strategy:
       matrix:
-        xcode-version: ['16.3']
+        xcode-version: ['16.4', '16.2']
     runs-on: macos-15
     timeout-minutes: 3
     env:
@@ -23,7 +23,7 @@ jobs:
   test-on-linux:
     strategy:
       matrix:
-        swift-version: ['6.1', '6.0', '5.10']
+        swift-version: ['6.1', '6.0']
     runs-on: ubuntu-latest
     timeout-minutes: 3
     steps:
diff --git a/Package.swift b/Package.swift
index 7ca2991..8403c0a 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,11 +1,11 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 6.0
 
 import PackageDescription
 
 let package = Package(
     name: "Hex.swift",
     platforms: [
-        .iOS(.v12), .tvOS(.v12), .watchOS(.v4), .macOS(.v10_13),
+        .iOS(.v14), .tvOS(.v14), .watchOS(.v7), .macOS(.v11), .macCatalyst(.v14),
     ],
     products: [
         .library(name: "Hex", targets: ["Hex"])
diff --git a/Sources/Hex/Collection+Hex.swift b/Sources/Hex/Collection+Hex.swift
index ae05c4a..030a2e6 100644
--- a/Sources/Hex/Collection+Hex.swift
+++ b/Sources/Hex/Collection+Hex.swift
@@ -21,7 +21,6 @@ extension Collection<UInt8> {
     ///
     /// - Parameter options: Encoding options. Default value is `[]`.
     @inlinable
-    @available(iOS 14.0, macOS 11.0, tvOS 14.0, watchOS 7.0, *)
     public func hexEncodedString(options: Base16.EncodingOptions = []) -> String {
         let capacity = Base16.estimateEncodedCount(bytes: count)
         return String(unsafeUninitializedCapacity: capacity) { buffer in
diff --git a/Sources/Hex/Sequence+Hex.swift b/Sources/Hex/Sequence+Hex.swift
index 498ec80..ecb3eed 100644
--- a/Sources/Hex/Sequence+Hex.swift
+++ b/Sources/Hex/Sequence+Hex.swift
@@ -17,11 +17,9 @@ extension Sequence<UInt8> {
     public func hexEncodedString(options: Base16.EncodingOptions = []) -> String {
         let seq = Base16EncodingSequence(sequence: self, options: options)
 
-        #if compiler(>=6.0)
         if #available(iOS 18.0, macOS 15.0, tvOS 18.0, visionOS 2.0, watchOS 11.0, *) {
             return String(validating: seq, as: UTF8.self).unsafelyUnwrapped
         }
-        #endif
 
         return String(bytes: seq, encoding: .utf8).unsafelyUnwrapped
     }
diff --git a/Tests/HexTests/Base16Tests.swift b/Tests/HexTests/Base16Tests.swift
index 4ae0cfe..42c1aad 100644
--- a/Tests/HexTests/Base16Tests.swift
+++ b/Tests/HexTests/Base16Tests.swift
@@ -1,5 +1,3 @@
-#if compiler(>=6.0)
-
 import Foundation
 import Hex
 import Testing
@@ -64,5 +62,3 @@ struct Base16Tests {
         #expect(result == .error)
     }
 }
-
-#endif
diff --git a/Tests/HexTests/Collection+HexTests.swift b/Tests/HexTests/Collection+HexTests.swift
index 26faeb9..a229caf 100644
--- a/Tests/HexTests/Collection+HexTests.swift
+++ b/Tests/HexTests/Collection+HexTests.swift
@@ -1,5 +1,3 @@
-#if compiler(>=6.0)
-
 import Foundation
 import Hex
 import Testing
@@ -60,5 +58,3 @@ struct CollectionHexTests {
         #expect(hexString == "")
     }
 }
-
-#endif
diff --git a/Tests/HexTests/Data+HexTests.swift b/Tests/HexTests/Data+HexTests.swift
index fc98a24..82a3e78 100644
--- a/Tests/HexTests/Data+HexTests.swift
+++ b/Tests/HexTests/Data+HexTests.swift
@@ -1,5 +1,3 @@
-#if compiler(>=6.0)
-
 import Foundation
 import Hex
 import Testing
@@ -126,5 +124,3 @@ struct DataHexTests {
         #expect(data == nil)
     }
 }
-
-#endif
diff --git a/Tests/HexTests/JSONTests.swift b/Tests/HexTests/JSONTests.swift
index a7b6e5d..49d4b36 100644
--- a/Tests/HexTests/JSONTests.swift
+++ b/Tests/HexTests/JSONTests.swift
@@ -1,5 +1,3 @@
-#if compiler(>=6.0)
-
 import Foundation
 import Hex
 import Testing
@@ -123,5 +121,3 @@ struct JSONTests {
         #expect(String(decoding: string, as: UTF8.self) == #"["313233344a4b4c4d"]"#)
     }
 }
-
-#endif
diff --git a/Tests/HexTests/Sequence+HexTests.swift b/Tests/HexTests/Sequence+HexTests.swift
index 06e02bc..adee65d 100644
--- a/Tests/HexTests/Sequence+HexTests.swift
+++ b/Tests/HexTests/Sequence+HexTests.swift
@@ -1,5 +1,3 @@
-#if compiler(>=6.0)
-
 import Foundation
 import Hex
 import Testing
@@ -60,5 +58,3 @@ struct SequenceHexTests {
         #expect(hexString == "")
     }
 }
-
-#endif
diff --git a/benchmark.sh b/benchmark.sh
index faab27b..0ca7eb3 100755
--- a/benchmark.sh
+++ b/benchmark.sh
@@ -15,13 +15,13 @@ mkdir -p ./benchmark/Sources/benchmark
 cd benchmark
 
 cat << EOF > ./Package.swift
-// swift-tools-version: 5.8
+// swift-tools-version: 6.0
 
 import PackageDescription
 
 let package = Package(
   name: "benchmark",
-  platforms: [.macOS(.v11)],
+  platforms: [.macOS(.v15)],
   dependencies: [
     $PACKAGE
   ],