diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d276386..c7be071e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [2.2.1](https://github.com/amejiarosario/dsa.js/compare/2.2.0...2.2.1) (2020-10-02)
+
+
+### Bug Fixes
+
+* **book:** add introduction ([4505eb6](https://github.com/amejiarosario/dsa.js/commit/4505eb64a63b282ca9685b3b2cabb657149d9fe7))
+
 # [2.2.0](https://github.com/amejiarosario/dsa.js/compare/2.1.0...2.2.0) (2020-09-29)
 
 
diff --git a/package-lock.json b/package-lock.json
index 9505dcc3..eb408cf2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "dsa.js",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 990a4328..caf7c267 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dsa.js",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Data Structures & Algorithms in JS",
   "author": "Adrian Mejia <hi+dsajs@adrianmejia.com> (https://adrianmejia.com)",
   "homepage": "https://github.com/amejiarosario/dsa.js",