diff --git a/Package.swift b/Package.swift
index 37a294f..c65b6a1 100644
--- a/Package.swift
+++ b/Package.swift
@@ -19,7 +19,7 @@ let package = Package(
         .package(url: "https://github.com/jpsim/Yams.git", from: "4.0.6"),
         .package(url: "https://github.com/apple/swift-tools-support-core.git", from: "0.2.2"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.4.2"),
-        .package(url: "https://github.com/apple/swift-syntax.git", .exact("0.50100.0")),
+        .package(url: "https://github.com/apple/swift-syntax.git", .exact("509.1.1")),
         .package(url: "https://github.com/jkandzi/Progress.swift", from: "0.4.0")
     ],
     targets: [