diff --git a/changelog.md b/changelog.md
index 7dc95ca..319445e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,13 @@
 
+## v0.9.1 (2021-10-20)
+
+#### 🧹 Miscellaneous Chores
+* [#325](https://github.com/cdk-cosmos/cosmos/pull/325) #324 Adding documentation for contribution and missing release notes ([@unerh](https://github.com/unerh))
+
+#### Committers: 1
+- Hakan Uner ([@unerh](https://github.com/unerh))
+
+
 ## v0.9.0 (2021-10-18)
 
 #### 🐛 Bug Fix
diff --git a/lerna.json b/lerna.json
index ce1534b..7192863 100644
--- a/lerna.json
+++ b/lerna.json
@@ -5,7 +5,7 @@
     "packages/@cdk-cosmos/*",
     "packages/@cosmos-building-blocks/*"
   ],
-  "version": "0.9.0",
+  "version": "0.9.1",
   "command": {
     "publish": {
       "ignoreChanges": [
diff --git a/packages/@cdk-cosmos/cdk-credentials-plugin/package.json b/packages/@cdk-cosmos/cdk-credentials-plugin/package.json
index 9b80d46..fd4a1a8 100644
--- a/packages/@cdk-cosmos/cdk-credentials-plugin/package.json
+++ b/packages/@cdk-cosmos/cdk-credentials-plugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cdk-cosmos/cdk-credentials-plugin",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/packages/@cdk-cosmos/core/package.json b/packages/@cdk-cosmos/core/package.json
index c793ac0..fb2f0d6 100644
--- a/packages/@cdk-cosmos/core/package.json
+++ b/packages/@cdk-cosmos/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cdk-cosmos/core",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
@@ -26,8 +26,8 @@
     "clean": "rm -rf lib"
   },
   "dependencies": {
-    "@cosmos-building-blocks/common": "^0.9.0",
-    "@cosmos-building-blocks/pipeline": "^0.9.0"
+    "@cosmos-building-blocks/common": "^0.9.1",
+    "@cosmos-building-blocks/pipeline": "^0.9.1"
   },
   "peerDependencies": {
     "@aws-cdk/aws-certificatemanager": "^1.104.0",
diff --git a/packages/@cosmos-building-blocks/app-ec2/package.json b/packages/@cosmos-building-blocks/app-ec2/package.json
index dbcbc5e..29415c3 100644
--- a/packages/@cosmos-building-blocks/app-ec2/package.json
+++ b/packages/@cosmos-building-blocks/app-ec2/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmos-building-blocks/app-ec2",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/packages/@cosmos-building-blocks/common/package.json b/packages/@cosmos-building-blocks/common/package.json
index dee26b8..c8d27e0 100644
--- a/packages/@cosmos-building-blocks/common/package.json
+++ b/packages/@cosmos-building-blocks/common/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmos-building-blocks/common",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/packages/@cosmos-building-blocks/network/package.json b/packages/@cosmos-building-blocks/network/package.json
index d3bfcc4..52efa03 100644
--- a/packages/@cosmos-building-blocks/network/package.json
+++ b/packages/@cosmos-building-blocks/network/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmos-building-blocks/network",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/packages/@cosmos-building-blocks/pipeline/package.json b/packages/@cosmos-building-blocks/pipeline/package.json
index 720102a..bf48a22 100644
--- a/packages/@cosmos-building-blocks/pipeline/package.json
+++ b/packages/@cosmos-building-blocks/pipeline/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmos-building-blocks/pipeline",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
@@ -26,7 +26,7 @@
     "clean": "rm -rf lib"
   },
   "dependencies": {
-    "@cosmos-building-blocks/common": "^0.9.0"
+    "@cosmos-building-blocks/common": "^0.9.1"
   },
   "peerDependencies": {
     "@aws-cdk/aws-codebuild": "^1.104.0",
diff --git a/packages/@cosmos-building-blocks/service/package.json b/packages/@cosmos-building-blocks/service/package.json
index e95b987..fadffce 100644
--- a/packages/@cosmos-building-blocks/service/package.json
+++ b/packages/@cosmos-building-blocks/service/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmos-building-blocks/service",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "license": "Apache-2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",