diff --git a/Package.swift b/Package.swift
index 04468d7..837fbf4 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.1
+// swift-tools-version:6.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -21,9 +21,18 @@ let package = Package(
         .target(
             name: "OCGoogleDirectionsAPI",
             dependencies: [],
-            publicHeadersPath: "."),
+            publicHeadersPath: ".",
+            swiftSettings: .completeConcurrencyChecking),
         .testTarget(
             name: "OCGoogleDirectionsAPITests",
             dependencies: ["OCGoogleDirectionsAPI"]),
     ]
 )
+
+extension Array where Element == SwiftSetting {
+    static let completeConcurrencyChecking: Self = [.completeConcurrencyChecking]
+}
+
+extension SwiftSetting {
+    static let completeConcurrencyChecking = Self.unsafeFlags(["-strict-concurrency=complete"])
+}
diff --git a/Sources/OCGoogleDirectionsAPI/Client/OCDirectionsAPIClient.h b/Sources/OCGoogleDirectionsAPI/Client/OCDirectionsAPIClient.h
index e3ddeb3..5dd4f3e 100644
--- a/Sources/OCGoogleDirectionsAPI/Client/OCDirectionsAPIClient.h
+++ b/Sources/OCGoogleDirectionsAPI/Client/OCDirectionsAPIClient.h
@@ -12,7 +12,7 @@
 #import "RequestURLCreator/OCDirectionsRequestURLCreator.h"
 #import "RequestURLCreator/OCDirectionsRequestURLCreatorJSON.h"
 
-typedef void (^OCDirectionsRequestCallback)(OCDirectionsResponse *response, NSError *error);
+typedef NS_SWIFT_UI_ACTOR NS_SWIFT_SENDABLE void (^OCDirectionsRequestCallback)(OCDirectionsResponse *response, NSError *error);
 
 @interface OCDirectionsAPIClient : NSObject