diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 181ab37..4dda778 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: macos-15
     strategy:
       matrix:
-        xcode: ['16.4']
+        xcode: ['26.3']
         config: ['debug', 'release']
 
     steps:
diff --git a/Package.swift b/Package.swift
index 8fb22f5..cde1a42 100644
--- a/Package.swift
+++ b/Package.swift
@@ -14,7 +14,7 @@ let package = Package(
     ),
   ],
   dependencies: [
-    .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.0.0"..<"602.0.0"),
+    .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.0.0"..<"604.0.0"),
   ],
   targets: [
     .target(