diff --git a/BUILD b/BUILD
index 9dd4eacfe..fdcb79557 100644
--- a/BUILD
+++ b/BUILD
@@ -150,7 +150,7 @@ swift_binary(
     name = "swiftlint",
     package_name = "SwiftLint",
     srcs = glob(["Source/swiftlint/**/*.swift"]),
-    copts = copts,
+    copts = copts + strict_concurrency_copts,
     visibility = ["//visibility:public"],
     deps = [
         ":SwiftLintFramework",
diff --git a/Package.swift b/Package.swift
index 0dfcc60a6..37a7f3fbe 100644
--- a/Package.swift
+++ b/Package.swift
@@ -9,6 +9,7 @@ let swiftFeatures: [SwiftSetting] = [
     .enableUpcomingFeature("ForwardTrailingClosures"),
     .enableUpcomingFeature("ImplicitOpenExistentials"),
 ]
+let strictConcurrency = [SwiftSetting.enableExperimentalFeature("StrictConcurrency")]
 
 let swiftLintPluginDependencies: [Target.Dependency]
 
@@ -55,7 +56,7 @@ let package = Package(
                 "SwiftLintFramework",
                 "SwiftyTextTable",
             ],
-            swiftSettings: swiftFeatures
+            swiftSettings: swiftFeatures + strictConcurrency
         ),
         .testTarget(
             name: "CLITests",
@@ -88,7 +89,8 @@ let package = Package(
         ),
         .target(
             name: "SwiftLintExtraRules",
-            dependencies: ["SwiftLintCore"]
+            dependencies: ["SwiftLintCore"],
+            swiftSettings: strictConcurrency
         ),
         .target(
             name: "SwiftLintFramework",
@@ -100,7 +102,7 @@ let package = Package(
                 .product(name: "ArgumentParser", package: "swift-argument-parser"),
                 "CollectionConcurrencyKit",
             ],
-            swiftSettings: swiftFeatures
+            swiftSettings: swiftFeatures + strictConcurrency
         ),
         .target(name: "DyldWarningWorkaround"),
         .target(
@@ -155,7 +157,7 @@ let package = Package(
                 .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
             ],
             path: "Source/SwiftLintCoreMacros",
-            swiftSettings: swiftFeatures
+            swiftSettings: swiftFeatures + strictConcurrency
         ),
         .testTarget(
             name: "MacroTests",
diff --git a/Source/SwiftLintCore/Models/Issue.swift b/Source/SwiftLintCore/Models/Issue.swift
index bdb9fbfe9..0954bac83 100644
--- a/Source/SwiftLintCore/Models/Issue.swift
+++ b/Source/SwiftLintCore/Models/Issue.swift
@@ -75,7 +75,7 @@ public enum Issue: LocalizedError, Equatable {
     case baselineNotReadable(path: String)
 
     /// Flag to enable warnings for deprecations being printed to the console. Printing is enabled by default.
-    public static var printDeprecationWarnings = true
+    package nonisolated(unsafe) static var printDeprecationWarnings = true
 
     /// Hook used to capture all messages normally printed to stdout and return them back to the caller.
     ///
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 6fc1eb3f1..3ec912591 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -19,9 +19,6 @@ jobs:
   strategy:
     maxParallel: 10
     matrix:
-      '13':
-        image: 'macOS-13'
-        xcode: '15.2'
       '14':
         image: 'macOS-14'
         xcode: '15.4'