diff --git a/.github/workflows/jira.yml b/.github/workflows/jira.yml
index b6ddc58f..caa4bbdf 100644
--- a/.github/workflows/jira.yml
+++ b/.github/workflows/jira.yml
@@ -30,4 +30,4 @@ jobs:
         uses: atlassian/gajira-transition@v3
         with:
           issue: ${{ steps.create.outputs.issue }}
-          transition: ${{ secrets.JIRA_TRANSITION }}
\ No newline at end of file
+          transition: ${{ secrets.JIRA_TRANSITION }}
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
index adb3107d..20dad4a4 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@@ -31,4 +31,4 @@ jobs:
       - run: npm ci
       - run: npm publish
         env:
-          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.PAT_TOKEN }}
diff --git a/.github/workflows/sast-scan.yml b/.github/workflows/sast-scan.yml
new file mode 100644
index 00000000..3b9521a5
--- /dev/null
+++ b/.github/workflows/sast-scan.yml
@@ -0,0 +1,11 @@
+name: SAST Scan
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  security-sast:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Semgrep Scan
+        run: docker run -v /var/run/docker.sock:/var/run/docker.sock -v "${PWD}:/src" returntocorp/semgrep semgrep scan --config auto
\ No newline at end of file
diff --git a/.talismanrc b/.talismanrc
index 641a0d6a..580bf496 100644
--- a/.talismanrc
+++ b/.talismanrc
@@ -1,6 +1,7 @@
 fileignoreconfig:
 - filename: package-lock.json
   checksum: f3c78348e6bb5b0d9521aed5fab5eeff46ccc3b0d2a4c5e3b272c4b23cfa891b
+  checksum: 28f8e6d0e7856b4a568fd260dcc4deb531bcdbebbbff956b008ce7dd26a0475d
 - filename: test/typescript/taxonomy.test.ts
   checksum: e4bdf633e147fd60d929d379f20c814eed5f68b11421d7b53ec8826e9142de37
 - filename: src/core/modules/taxonomy.js
@@ -11,4 +12,7 @@ fileignoreconfig:
   checksum: c88b336f9a271397ffedcf8c5085941ceb0bd1cd7e25ed9ada3acd8ce4f8970c
 - filename: test/typescript/stack.test.ts
   checksum: f90544059eacaf20571f59bac90acd4e4c2178601a6f00ede49816a4621aefa8
+  checksum: bbb3c425f8e1a63d4793f69ee9eaba9559294ff53f163a28f70ae54b1792276a
+- filename: src/core/contentstack.js
+  checksum: 90a3b07300155a34f67dc3df87363107eec202123a21bc0cefda324e477a676d
 version: ""
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e356c541..918b389a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,26 @@
 ## Change log
 
 ### Version: 3.20.0
+
 #### Date: March-12-2024
 ##### New Features:
  - Variants Feature support added
  
+
+#### Date:  May-31-2024
+##### Enhanncement:
+ - Adds Timeline Preview changes
+
+### Version: 3.20.1
+#### Date:  July-09-2024
+##### Fix:
+ - Type support for LivePreviewQuery method params
+
+### Version: 3.19.3
+#### Date:  May-17-2024
+##### Enhanncement:
+ - Update Asset URL method added
+
 ### Version: 3.19.2
 #### Date:  April-17-2024
 ##### Dependency:
diff --git a/index.d.ts b/index.d.ts
index 5b97e516..89126d2f 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -98,6 +98,8 @@ export interface LivePreviewConfigWithPreviewToken {
 export interface LivePreviewQuery {
     live_preview: string
     content_type_uid: string
+    preview_timestamp: string
+    release_id: string
 }
 
 export interface RetryDelayOption {
@@ -170,6 +172,7 @@ export function Stack(config: Config): Stack;
  */
 export function Stack(api_key: string, access_token: string, environment_name: string, region?: string, fetchOptions?: FetchOptions): Stack;
 
+export function updateAssetURL(entry: object): object;
 export class ContentType {
     constructor();
     content_type_uid: string
diff --git a/package-lock.json b/package-lock.json
index a6208978..d3cc2881 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "3.20.0",
       "license": "MIT",
       "dependencies": {
-        "@contentstack/utils": "^1.3.3",
+        "@contentstack/utils": "^1.3.8",
         "cheerio": "^1.0.0-rc.12",
         "es6-promise": "^4.1.1",
         "isomorphic-fetch": "^3.0.0",
@@ -1800,9 +1800,9 @@
       "dev": true
     },
     "node_modules/@contentstack/utils": {
-      "version": "1.3.3",
-      "resolved": "https://registry.npmjs.org/@contentstack/utils/-/utils-1.3.3.tgz",
-      "integrity": "sha512-Zj2ejyfbxZlXrF1Wl9lhwK2mCCWo5ooiDnSlNA8nupZ1nDsTfouYERgps8r/uyzm18Vda2wBitxloThxKAyzsA=="
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/@contentstack/utils/-/utils-1.3.8.tgz",
+      "integrity": "sha512-BKZcZs2/odh9nmugLmiNVBEbz34gjfgibZOsRlYV9ux7t+GkfjbELDjWJpKenL6G5Mb270VXVuDbNqkDLK96Zw=="
     },
     "node_modules/@cspotcode/source-map-support": {
       "version": "0.8.1",
diff --git a/package.json b/package.json
index 3c1c8bd7..9c8ef782 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "contentstack",
-  "version": "3.20.0",
+  "version": "4.0.0",
   "description": "Contentstack Javascript SDK",
   "homepage": "https://www.contentstack.com/",
   "author": {
@@ -11,7 +11,7 @@
   "browser": "dist/web/contentstack.js",
   "react-native": "dist/react-native/contentstack.js",
   "types": "./index.d.ts",
-  "_id": "contentstack@3.16.1",
+  "_id": "contentstack@3.19.3",
   "scripts": {
     "test": "npm run test:e2e && npm run test:typescript",
     "test:e2e": "tape test/index.js | tap-html --out ./tap-html.html",
@@ -99,7 +99,7 @@
     "webpack-node-externals": "^3.0.0"
   },
   "dependencies": {
-    "@contentstack/utils": "^1.3.3",
+    "@contentstack/utils": "^1.3.8",
     "cheerio": "^1.0.0-rc.12",
     "es6-promise": "^4.1.1",
     "isomorphic-fetch": "^3.0.0",
diff --git a/src/core/contentstack.js b/src/core/contentstack.js
index fffc5f7a..bcffa3a3 100755
--- a/src/core/contentstack.js
+++ b/src/core/contentstack.js
@@ -27,13 +27,39 @@ class Contentstack {
 		
 		this.Utils = require('@contentstack/utils');
 	}
-/**
 
-* @memberOf Contentstack
-*/
+	/**
+
+	* @memberOf Contentstack
+	*/
 	Stack(...stack_arguments){
 		return new Stack(...stack_arguments);
 	}
+
+	updateAssetURL(entry) {
+		// check if entry consist of _embedded_items object
+		if (entry._embedded_items == undefined) {
+			throw new Error("_embedded_items not present in entry. Call includeEmbeddedItems() before fetching entry.");
+		}
+
+		// Iterate through each object in _embedded_items and update the asset link
+		for (let key in entry._embedded_items) {
+			let embedded_item = entry._embedded_items[key];
+			if (Array.isArray(embedded_item)) {
+
+				embedded_item.forEach((item) => {
+
+					if (item._content_type_uid == 'sys_assets' && item.filename) {
+
+						const correspondingAsset = entry[key].children.find(child => child.attrs['asset-uid'] === item.uid);
+						if (correspondingAsset) {
+							correspondingAsset.attrs['asset-link'] = item.url;
+						}
+					}
+				});
+			}
+		}
+	}
 }
 
 module.exports = new Contentstack();
diff --git a/src/core/lib/utils.js b/src/core/lib/utils.js
index 1311ef0c..894284f3 100755
--- a/src/core/lib/utils.js
+++ b/src/core/lib/utils.js
@@ -91,7 +91,7 @@ export function merge(target, source) {
 
 // return true if process is running in browser else false
 export function isBrowser() {
-    return (typeof window !== "undefined" && typeof process === "object" && process.title === "browser");
+    return (typeof window !== "undefined");
 }
 
 
diff --git a/src/core/stack.js b/src/core/stack.js
index 59b105e6..f18a25ab 100755
--- a/src/core/stack.js
+++ b/src/core/stack.js
@@ -111,6 +111,7 @@ export default class Stack {
                     };
                     if (typeof stack_arguments[0].live_preview == "object") {
                         this.live_preview =  Utils.mergeDeep(this.config.live_preview , stack_arguments[0].live_preview)
+                        this.setLivePreviewTimelinePreviewForClient()
                     }
                     if (typeof stack_arguments[0].branch === "string" && stack_arguments[0].branch !== undefined) {
                         this.headers.branch = stack_arguments[0].branch
@@ -276,12 +277,35 @@ export default class Stack {
     }
     
 
+    setLivePreviewTimelinePreviewForClient() {
+        if (Utils.isBrowser()){
+            const params = new URL(document.location.toString()).searchParams;
+            if (params.has('live_preview')) {
+                this.live_preview.live_preview = params.get('live_preview');
+            }
+            if (params.has('release_id')) {
+                this.headers['release_id'] = params.get('release_id');
+            }
+            if (params.has('preview_timestamp')) {
+                this.headers['preview_timestamp'] = params.get('preview_timestamp');
+            }
+        }
+    }
+
+
     livePreviewQuery(query) {
         if (this.live_preview) {
             this.live_preview.live_preview = query.live_preview || 'init';
             this.live_preview.content_type_uid = query.content_type_uid;
             this.live_preview.entry_uid = query.entry_uid
         }
+
+        if (query.hasOwnProperty('release_id')) {
+            this.headers['release_id'] = query.release_id;
+        }
+        if (query.hasOwnProperty('preview_timestamp')) {
+            this.headers['preview_timestamp'] = query.preview_timestamp;
+        }
     }
 
      /**