diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f5eab7..c866bfd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## v0.23.0
+
+* Fixed bug in README Stack example
+* Updated README instructions on webpage installation
+
 ## v0.22.0
 
 * Added `implies` function
diff --git a/README.md b/README.md
index a131cbc..2e5de11 100644
--- a/README.md
+++ b/README.md
@@ -46,15 +46,15 @@ As a dependency run the command:
 
 You can also use a specific [version](https://www.npmjs.com/package/@final-hill/decorator-contracts):
 
-`npm install @final-hill/decorator-contracts@0.22.0`
+`npm install @final-hill/decorator-contracts@0.23.0`
 
 For use in a webpage:
 
-`<script src="https://unpkg.com/@final-hill/decorator-contracts"></script>`
+`<script src="https://cdn.skypack.dev/@final-hill/decorator-contracts"></script>`
 
 With a specific [version](https://www.npmjs.com/package/@final-hill/decorator-contracts@0.22.0):
 
-`<script src="https://unpkg.com/@final-hill/decorator-contracts@0.22.0"></script>`
+`<script src="https://cdn.skypack.dev/@final-hill/decorator-contracts@0.23.0"></script>`
 
 ## Usage
 
@@ -92,7 +92,7 @@ const stackContract = new Contract<StackType<any>>({
         demands(self){ return !self.isFull(); },
         ensures(self, old, item) {
             return !self.isEmpty() &&
-                self.top === item &&
+                self.top() === item &&
                 self.size === old.size + 1;
         }
     },
diff --git a/package.json b/package.json
index 2665960..d9a92ed 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@final-hill/decorator-contracts",
-    "version": "0.22.0",
+    "version": "0.23.0",
     "description": "Code Contracts for TypeScript and ECMAScript classes",
     "main": "dist/index.js",
     "types": "dist/index.d.ts",