diff --git a/src/intercept.ts b/src/intercept.ts
index a81efdb..2c7a30b 100644
--- a/src/intercept.ts
+++ b/src/intercept.ts
@@ -15,6 +15,7 @@ import * as Github from './sites/github';
 import * as LinkedIn from './sites/linkedin';
 import * as Instagram from './sites/instagram';
 import * as YouTube from './sites/youtube';
+import * as Substack from './sites/substack';
 import { createStore, Store } from './store';
 
 const store = createStore();
@@ -31,6 +32,8 @@ export function eradicate(store: Store) {
 		Github.eradicate(store);
 	} else if (LinkedIn.checkSite()) {
 		LinkedIn.eradicate(store);
+	} else if (Substack.checkSite()) {
+		Substack.eradicate(store)
 	} else if (YouTube.checkSite()) {
 		YouTube.eradicate(store);
 	} else if (Instagram.checkSite()) {
diff --git a/src/manifest-chrome.json b/src/manifest-chrome.json
index 2ac0b09..72eb2a4 100644
--- a/src/manifest-chrome.json
+++ b/src/manifest-chrome.json
@@ -2,8 +2,11 @@
 	"name": "News Feed Eradicator",
 	"version": "2.3.1",
 	"description": "Eradicate social media noise by replacing your entire news feed with an inspiring quote",
-	"manifest_version": 3,
-	"permissions": ["storage", "scripting"],
+	"manifest_version": 4,
+	"permissions": [
+		"storage",
+		"scripting"
+	],
 	"optional_host_permissions": [
 		"http://www.facebook.com/*",
 		"https://www.facebook.com/*",
@@ -24,7 +27,8 @@
 		"https://www.github.com/*",
 		"https://github.com/*",
 		"http://www.instagram.com/*",
-		"https://www.instagram.com/*"
+		"https://www.instagram.com/*",
+		"https://substack.com/*"
 	],
 	"action": {
 		"default_icon": {
diff --git a/src/manifest.json b/src/manifest.json
index cb228d5..c469217 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -3,7 +3,9 @@
 	"version": "2.2.7",
 	"description": "Eradicate social media noise by replacing your entire news feed with an inspiring quote",
 	"manifest_version": 2,
-	"permissions": ["storage"],
+	"permissions": [
+		"storage"
+	],
 	"optional_permissions": [
 		"http://www.facebook.com/*",
 		"https://www.facebook.com/*",
@@ -24,7 +26,8 @@
 		"https://www.github.com/*",
 		"https://github.com/*",
 		"http://www.instagram.com/*",
-		"https://www.instagram.com/*"
+		"https://www.instagram.com/*",
+		"https://substack.com/*"
 	],
 	"browser_action": {
 		"default_icon": {
diff --git a/src/sites/index.ts b/src/sites/index.ts
index ebbdd0d..7d92387 100644
--- a/src/sites/index.ts
+++ b/src/sites/index.ts
@@ -11,7 +11,8 @@ export type SiteId =
 	| 'linkedin'
 	| 'youtube'
 	| 'instagram'
-	| 'github';
+	| 'github'
+	| 'substack';
 
 export const Sites: Record<SiteId, Site> = {
 	facebook: {
@@ -97,6 +98,12 @@ export const Sites: Record<SiteId, Site> = {
 		origins: ['https://github.com/*'],
 		css: githubCss,
 	},
+	substack: {
+		label: 'Substack',
+		domain: ['substack.com'],
+		paths: ['/', '/home'],
+		origins: ['https://substack.com/*'],
+	},
 };
 
 export type Site = {
diff --git a/src/sites/instagram.ts b/src/sites/instagram.ts
index 3b87c32..c958aec 100644
--- a/src/sites/instagram.ts
+++ b/src/sites/instagram.ts
@@ -1,7 +1,7 @@
 import injectUI, { isAlreadyInjected } from '../lib/inject-ui';
 import { isEnabled } from '../lib/is-enabled';
 import { Store } from '../store';
-import {injectCSS} from "./shared";
+import { injectCSS } from "./shared";
 
 export function checkSite(): boolean {
 	return window.location.host.includes('instagram.com');
diff --git a/src/sites/substack.str.css b/src/sites/substack.str.css
new file mode 100644
index 0000000..f9fc995
--- /dev/null
+++ b/src/sites/substack.str.css
@@ -0,0 +1,5 @@
+/* Substack */
+html:not([data-nfe-enabled='false']) div[aria-label='Notes feed'] div[class*="feedItem"] {
+    opacity: 0 !important;
+    pointer-events: none !important;
+}
\ No newline at end of file
diff --git a/src/sites/substack.ts b/src/sites/substack.ts
new file mode 100644
index 0000000..83df13e
--- /dev/null
+++ b/src/sites/substack.ts
@@ -0,0 +1,33 @@
+import injectUI, { isAlreadyInjected } from '../lib/inject-ui';
+import { isEnabled } from '../lib/is-enabled';
+import { Store } from '../store';
+import { injectCSS } from "./shared";
+
+export function checkSite(): boolean {
+    return window.location.host.includes('substack.com');
+}
+
+export function eradicate(store: Store) {
+    function eradicateRetry() {
+        injectCSS('substack');
+
+        const settings = store.getState().settings;
+        if (settings == null || !isEnabled(settings)) {
+            return;
+        }
+
+        const container = document.querySelector('div[aria-label="Notes feed"]');
+        if (container == null) {
+            return;
+        }
+
+        // Add News Feed Eradicator quote/info panel
+        if (container && !isAlreadyInjected()) {
+            injectUI(container, store, { asFirstChild: true });
+        }
+    }
+
+    // This delay ensures that the elements have been created by Linkedin's
+    // scripts before we attempt to replace them
+    setInterval(eradicateRetry, 1000);
+}