diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..f2636e9
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,23 @@
+{
+  "pins" : [
+    {
+      "identity" : "swift-docc-plugin",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-docc-plugin",
+      "state" : {
+        "revision" : "85e4bb4e1cd62cec64a4b8e769dcefdf0c5b9d64",
+        "version" : "1.4.3"
+      }
+    },
+    {
+      "identity" : "swift-docc-symbolkit",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swiftlang/swift-docc-symbolkit",
+      "state" : {
+        "revision" : "b45d1f2ed151d057b54504d653e0da5552844e34",
+        "version" : "1.0.0"
+      }
+    }
+  ],
+  "version" : 2
+}
diff --git a/Package.swift b/Package.swift
index 7a0057d..f1aa26e 100644
--- a/Package.swift
+++ b/Package.swift
@@ -18,6 +18,7 @@ let package = Package(
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),
+      .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
diff --git a/README.md b/README.md
index 75ef61d..1db89cb 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,12 @@ UInt128/Int128.
 This library includes Swift Package support out of the box.
 Reference this git repository via XCode to install as a Package.
 
+  - Warning: This interface uses different initializers than earlier versions.
+
 You can also manually copy over the `Sources/(U)Int128.swift` files into your project
 and it should work great. This file split duplicates Apple's UInt128 and Int128
-files. Note: Some common utilities are located in the Int128.swift file.
+files. Note: Some common utilities are located in the `Common.swift` file which
+you'll also need if copying to your project.
 
 ## Documentation
 
diff --git a/Sources/UInt128/UInt128.docc/UInt128.md b/Sources/UInt128/UInt128.docc/UInt128.md
index f8e4704..177b025 100644
--- a/Sources/UInt128/UInt128.docc/UInt128.md
+++ b/Sources/UInt128/UInt128.docc/UInt128.md
@@ -42,6 +42,8 @@ These integer types are compliant with the following protocols:
 11. Sendable
 12. Codable
 
+This package has passed the XCode 6 strict concurrency requirements.
+
 ### Usage
 Since this library fully implements the UnsignedInteger or SignedInteger protocols, 
 you can use these data types just like any other native integer data type. For numbers larger