diff --git a/README.md b/README.md
index 242c418..d110d5b 100755
--- a/README.md
+++ b/README.md
@@ -191,6 +191,7 @@ Grouped in options:\
 [Slate](https://slate.com) -
 [SofRep](https://sofrep.com) -
 [Sports Illustrated](https://www.si.com) -
+[Substack](https://substack.com) -
 [The Art Newspaper](https://www.theartnewspaper.com) -
 [The Athletic](https://theathletic.com) -
 [The Intercept](https://theintercept.com) -
diff --git a/changelog.txt b/changelog.txt
index 8e0cef9..4dbf36b 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -4,6 +4,7 @@ Changelog Bypass Paywalls Clean - Chrome
 Post-release
 Add Limburger.nl
 Add Standaard.be
+Add Substack
 Add SuomenSotilas.fi
 Add Welt.de
 Add Wiwo.de
diff --git a/contentScript.js b/contentScript.js
index 2833590..5f87899 100755
--- a/contentScript.js
+++ b/contentScript.js
@@ -39,7 +39,7 @@ var usa_outside_mag_domains = ["backpacker.com", "betamtb.com", "betternutrition
 var usa_tribune_domains = ['baltimoresun.com', 'chicagotribune.com', 'courant.com', 'dailypress.com', 'mcall.com', 'nydailynews.com', 'orlandosentinel.com', 'pilotonline.com', 'sun-sentinel.com'];
 
 // clean local storage of sites (with an exemption for hold-list)
-var arr_localstorage_hold = ['abc.es', 'allgaeuer-zeitung.de', 'augsburger-allgemeine.de', 'barrons.com', 'businessoffashion.com', 'challenges.fr', 'charliehebdo.fr', 'cmjornal.pt', 'corriere.it', 'corrieredellosport.it', 'eldiario.es', 'elespanol.com', 'elle.fr', 'elpais.com', 'elperiodico.com', 'enotes.com', 'estadao.com.br', 'forbes.com', 'fortune.com', 'freiepresse.de', 'ilfoglio.it', 'inc42.com', 'lanouvellerepublique.fr', 'lesechos.fr', 'mid-day.com', 'nytimes.com', 'nzherald.co.nz', 'scmp.com', 'seekingalpha.com', 'telegraph.co.uk', 'thehindu.com', 'thetimes.co.uk', 'wsj.com'].concat(de_funke_medien_domains, de_westfalen_medien_domains, es_epiberica_domains, es_grupo_vocento_domains, es_unidad_domains, fr_groupe_ebra_domains, fr_groupe_la_depeche_domains, fr_groupe_nice_matin_domains, it_quotidiano_domains, ca_gcm_domains, nl_dpg_media_domains, no_nhst_media_domains, usa_hearst_comm_domains);
+var arr_localstorage_hold = ['abc.es', 'allgaeuer-zeitung.de', 'augsburger-allgemeine.de', 'barrons.com', 'businessoffashion.com', 'challenges.fr', 'charliehebdo.fr', 'cmjornal.pt', 'corriere.it', 'corrieredellosport.it', 'eldiario.es', 'elespanol.com', 'elle.fr', 'elpais.com', 'elperiodico.com', 'enotes.com', 'estadao.com.br', 'forbes.com', 'fortune.com', 'freiepresse.de', 'ilfoglio.it', 'inc42.com', 'lanouvellerepublique.fr', 'lesechos.fr', 'mid-day.com', 'nytimes.com', 'nzherald.co.nz', 'scmp.com', 'seekingalpha.com', 'substack.com', 'telegraph.co.uk', 'thehindu.com', 'thetimes.co.uk', 'wsj.com'].concat(de_funke_medien_domains, de_westfalen_medien_domains, es_epiberica_domains, es_grupo_vocento_domains, es_unidad_domains, fr_groupe_ebra_domains, fr_groupe_la_depeche_domains, fr_groupe_nice_matin_domains, it_quotidiano_domains, ca_gcm_domains, nl_dpg_media_domains, no_nhst_media_domains, usa_hearst_comm_domains);
 if (!matchDomain(arr_localstorage_hold)) {
   window.localStorage.clear();
 }
diff --git a/manifest.json b/manifest.json
index 2e22f8d..ed03326 100755
--- a/manifest.json
+++ b/manifest.json
@@ -527,6 +527,7 @@
     "*://*.stocknews.com/*",
     "*://*.stratfor.com/*",
     "*://*.studocu.com/*",
+    "*://*.substack.com/*",
     "*://*.sudinfo.be/*",
     "*://*.sudouest.fr/*",
     "*://*.sun-sentinel.com/*",
diff --git a/sites.js b/sites.js
index 7dd7fc8..3163909 100755
--- a/sites.js
+++ b/sites.js
@@ -1582,6 +1582,10 @@ var defaultSites = {
     domain: "studocu.com",
     allow_cookies: 1
   },
+  "Substack": {
+    domain: "substack.com",
+    useragent: "googlebot"
+  },
   "Suomen Sotilas": {
     domain: "suomensotilas.fi",
     allow_cookies: 1,
diff --git a/sites_updated.json b/sites_updated.json
index 2c07158..dafc1bf 100644
--- a/sites_updated.json
+++ b/sites_updated.json
@@ -25,6 +25,10 @@
     "remove_cookies": 1,
     "referer": "facebook"
   },
+  "Substack": {
+    "domain": "substack.com",
+    "useragent": "googlebot"
+  },
   "Suomen Sotilas": {
     "domain": "suomensotilas.fi",
     "allow_cookies": 1,