diff --git a/Package.swift b/Package.swift
index 7e62357..cc2e74d 100644
--- a/Package.swift
+++ b/Package.swift
@@ -41,7 +41,6 @@ let package = Package(
 )
 
 var swiftSettings: [SwiftSetting] { [
-    .enableUpcomingFeature("ExistentialAny"),
     .enableUpcomingFeature("ConciseMagicFile"),
     .enableUpcomingFeature("ForwardTrailingClosures"),
     .enableUpcomingFeature("DisableOutwardActorInference"),
diff --git a/Package@swift-5.9.swift b/Package@swift-5.9.swift
new file mode 100644
index 0000000..a7304ac
--- /dev/null
+++ b/Package@swift-5.9.swift
@@ -0,0 +1,50 @@
+// swift-tools-version:5.9
+import PackageDescription
+
+let package = Package(
+    name: "postgres-kit",
+    platforms: [
+        .macOS(.v10_15),
+        .iOS(.v13),
+        .watchOS(.v6),
+        .tvOS(.v13),
+    ],
+    products: [
+        .library(name: "PostgresKit", targets: ["PostgresKit"]),
+    ],
+    dependencies: [
+        .package(url: "https://github.com/vapor/postgres-nio.git", from: "1.20.2"),
+        .package(url: "https://github.com/vapor/sql-kit.git", from: "3.28.0"),
+        .package(url: "https://github.com/vapor/async-kit.git", from: "1.19.0"),
+        .package(url: "https://github.com/apple/swift-atomics.git", from: "1.2.0")
+    ],
+    targets: [
+        .target(
+            name: "PostgresKit",
+            dependencies: [
+                .product(name: "AsyncKit", package: "async-kit"),
+                .product(name: "PostgresNIO", package: "postgres-nio"),
+                .product(name: "SQLKit", package: "sql-kit"),
+                .product(name: "Atomics", package: "swift-atomics"),
+            ],
+            swiftSettings: swiftSettings
+        ),
+        .testTarget(
+            name: "PostgresKitTests",
+            dependencies: [
+                .target(name: "PostgresKit"),
+                .product(name: "SQLKitBenchmark", package: "sql-kit"),
+            ],
+            swiftSettings: swiftSettings
+        ),
+    ]
+)
+
+var swiftSettings: [SwiftSetting] { [
+    .enableUpcomingFeature("ExistentialAny"),
+    .enableUpcomingFeature("ConciseMagicFile"),
+    .enableUpcomingFeature("ForwardTrailingClosures"),
+    .enableUpcomingFeature("DisableOutwardActorInference"),
+    .enableUpcomingFeature("StrictConcurrency"),
+    .enableExperimentalFeature("StrictConcurrency=complete"),
+] }