diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6b5290d..4cf049f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,19 +6,17 @@ on:
   workflow_dispatch:
 
 jobs:
-  xcode_16:
-    runs-on: macos-14
+  xcode_16_4:
+    runs-on: macos-15
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_16.4.app/Contents/Developer
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: 🔍 Xcode Select
-        run: |
-          XCODE_PATH=`mdfind "kMDItemCFBundleIdentifier == 'com.apple.dt.Xcode' && kMDItemVersion = '16.*'" -onlyin /Applications | head -1`
-          echo "DEVELOPER_DIR=$XCODE_PATH/Contents/Developer" >> $GITHUB_ENV
       - name: Version
         run: swift --version
       - name: Build
-        run: swift build --build-tests
+        run: swift build --build-tests --enable-experimental-prebuilts
       - name: Test
         run: swift test --skip-build
 
@@ -76,15 +74,15 @@ jobs:
       - name: Test
         run: swift test --skip-build
 
-  linux_swift_6_0:
+  linux_swift_6_1:
     runs-on: ubuntu-latest
-    container: swiftlang/swift:nightly-6.0-jammy
+    container: swift:6.1.2
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Version
         run: swift --version
       - name: Build
-        run: swift build --build-tests
+        run: swift build --build-tests --enable-experimental-prebuilts
       - name: Test
         run: swift test --skip-build
diff --git a/Package.swift b/Package.swift
index 52c3bac..eb19b91 100644
--- a/Package.swift
+++ b/Package.swift
@@ -15,9 +15,8 @@ let package = Package(
         ),
     ],
     dependencies: [
-        // Depend on the Swift 5.10 release of SwiftSyntax
-        .package(url: "https://github.com/swhitty/FlyingFox.git", from: "0.16.0"),
-        .package(url: "https://github.com/swiftlang/swift-syntax", "509.0.0"..<"601.0.0-prerelease")
+        .package(url: "https://github.com/swhitty/FlyingFox.git", from: "0.22.0"),
+        .package(url: "https://github.com/swiftlang/swift-syntax", "510.0.0"..<"602.0.0")
     ],
     targets: [
         .target(