diff --git a/Package.swift b/Package.swift
index a45412c2864f527026d2b7b4c3e3a5de7badcc4a..066d801f030e5a985edfdd747c82ec71ada20e22 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,17 +1,10 @@
-// swift-tools-version: 5.6
+// swift-tools-version: 5.7
 import PackageDescription
 
 let swiftSettings: [SwiftSetting] = [
-  // Uncomment to measure compilation time:
-  //.unsafeFlags(
-  //  [
-  //    "-Xfrontend",
-  //    "-debug-time-function-bodies",
-  //    "-Xfrontend",
-  //    "-debug-time-expression-type-checking",
-  //  ],
-  //  .when(configuration: .debug)
-  //),
+  //.unsafeFlags(["-Xfrontend", "-warn-concurrency"], .when(configuration: .debug)),
+  //.unsafeFlags(["-Xfrontend", "-debug-time-function-bodies"], .when(configuration: .debug)),
+  //.unsafeFlags(["-Xfrontend", "-debug-time-expression-type-checking"], .when(configuration: .debug)),
 ]
 
 let package = Package(
diff --git a/README.md b/README.md
index b470d2ddfad029a3ec1c5dcee3255b6f8356cc95..764ed8eb87a7b3c8238e34d447ddca27ba91a027 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # xx-client-ios-db
 
-![Swift 5.6](https://img.shields.io/badge/swift-5.6-orange.svg)
+![Swift 5.7](https://img.shields.io/badge/swift-5.6-orange.svg)
 ![platform iOS macOS](https://img.shields.io/badge/platform-iOS_macOS-blue.svg)
 
 Database layer for xx Messenger iOS app.
 
 ## 🛠 Development
 
-Open `Package.swift` in Xcode (≥13).
+Open `Package.swift` in Xcode (≥14).
 
 ### Package structure