diff --git a/GTMAppAuth/Sources/Documentation.docc/GTMAppAuth.md b/GTMAppAuth/Sources/Documentation.docc/GTMAppAuth.md
new file mode 100644
index 00000000..e2ad12f2
--- /dev/null
+++ b/GTMAppAuth/Sources/Documentation.docc/GTMAppAuth.md
@@ -0,0 +1,20 @@
+# ``GTMAppAuth``
+
+A helper for AppAuth
+
+## Overview
+
+This is the overview.
+
+## Topics
+
+### Working with Auth Sessions
+
+- ``AuthSession``
+- ``AuthSessionTokenRefreshDelegate``
+
+### Storing Auth Sessions
+
+- ``KeychainStore``
+- ``AuthSessionStore``
+- ``KeychainHelper``
diff --git a/Package.swift b/Package.swift
index 8599e0d3..ead02cf8 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.5
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 // Copyright 2021 Google LLC