diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a53207a8..f5c8b0a0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,7 +19,7 @@ jobs:
           - platform: iOS
             scheme: "SWXMLHash iOS"
             action: "build-for-testing test-without-building"
-            sdk-and-dest: "-sdk iphonesimulator -destination \"OS=17.2,name=iPhone 15\""
+            sdk-and-dest: "-sdk iphonesimulator -destination \"name=iPhone 16,OS=latest\""
 
           - platform: tvOS
             scheme: "SWXMLHash tvOS"
@@ -38,7 +38,7 @@ jobs:
       - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90
         # using @v1
         with:
-          xcode-version: "16.2"
+          xcode-version: latest-stable
 
       - name: Build and Test
         env:
@@ -61,24 +61,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - image: swift:5.8-focal
-            skip-testing: true
-
-          - image: swift:5.8-jammy
-            skip-testing: true
-
-          - image: swift:5.8-rhel-ubi9
-            skip-testing: true
-
-          - image: swift:5.9-focal
-            skip-testing: true
-
-          - image: swift:5.9-jammy
-            skip-testing: true
-
-          - image: swift:5.9-rhel-ubi9
-            skip-testing: true
-
           - image: swift:5.10-focal
             skip-testing: true
 
@@ -96,6 +78,15 @@ jobs:
 
           - image: swift:6.0-rhel-ubi9
             perform-testing: true
+
+          - image: swift:6.4-jammy
+            perform-testing: true
+
+          - image: swift:6.4-noble
+            perform-testing: true
+
+          - image: swift:6.4-rhel-ubi9
+            perform-testing: true
     container:
       image: ${{ matrix.image }}
     timeout-minutes: 10
@@ -118,32 +109,18 @@ jobs:
     name: Windows Test
     runs-on: windows-2022
     timeout-minutes: 10
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - branch: swift-6.1-release
-            tag: 6.1-RELEASE
-            perform-testing: true
-
     steps:
       - name: Install Swift
-        uses: compnerd/gha-setup-swift@eeda069c5bc95ac8a9ac5cea7d4f588ae5420ca5
-        # using @main
+        uses: SwiftyLab/setup-swift@9014d4136569075c696d4151c7810ecde8712907
+        # using @v1.14.1
         with:
-          branch: ${{ matrix.branch}}
-          tag: ${{ matrix.tag }}
+          swift-version: "6.4"
 
       - name: Checkout
         uses: actions/checkout@v6
         with:
           persist-credentials: false
-      - name: Build
-        if: ${{ matrix.skip-testing }}
-        run: |
-          swift build
       - name: Build and test
-        if: ${{ matrix.perform-testing }}
         run: |
           swift build --build-tests
           swift test
diff --git a/.gitignore b/.gitignore
index 423e5959..93953bdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,9 @@ playground.xcworkspace
 # Packages/
 .build/
 
+# Xcode-generated workspace/settings created when opening Package.swift directly
+.swiftpm/
+
 # CocoaPods
 #
 # We recommend against adding the Pods directory to your .gitignore. However
diff --git a/.swift-version b/.swift-version
new file mode 100644
index 00000000..c596943a
--- /dev/null
+++ b/.swift-version
@@ -0,0 +1 @@
+6.4
diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
deleted file mode 100644
index 919434a6..00000000
--- a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Workspace
-   version = "1.0">
-   <FileRef
-      location = "self:">
-   </FileRef>
-</Workspace>
diff --git a/README.md b/README.md
index d564018d..3213fe6a 100644
--- a/README.md
+++ b/README.md
@@ -27,8 +27,8 @@ The API takes a lot of inspiration from
 
 ## Requirements
 
-- iOS 8.0+ / Mac OS X 10.9+ / tvOS 9.0+ / watchOS 2.0+
-- Xcode 8.0+
+- iOS 11.0+ / macOS 10.13+ / tvOS 11.0+ / watchOS 4.0+
+- Xcode 16.0+ / Swift 6.0+
 
 ## Installation
 
diff --git a/Source/FullXMLParser.swift b/Source/FullXMLParser.swift
index ed91ce4a..05be5ba0 100644
--- a/Source/FullXMLParser.swift
+++ b/Source/FullXMLParser.swift
@@ -95,17 +95,9 @@ class FullXMLParser: NSObject, SimpleXmlParser, XMLParserDelegate {
     }
 
     func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
-        #if os(Linux) && !swift(>=4.1.50)
-        if let err = parseError as? NSError {
-            parsingError = ParsingError(
-                    line: err.userInfo["NSXMLParserErrorLineNumber"] as? Int ?? 0,
-                    column: err.userInfo["NSXMLParserErrorColumn"] as? Int ?? 0)
-        }
-        #else
         let err = parseError as NSError
         parsingError = ParsingError(
                 line: err.userInfo["NSXMLParserErrorLineNumber"] as? Int ?? 0,
                 column: err.userInfo["NSXMLParserErrorColumn"] as? Int ?? 0)
-        #endif
     }
 }