diff --git a/README.md b/README.md
index 7434cf3..eecdfdd 100644
--- a/README.md
+++ b/README.md
@@ -13,12 +13,15 @@ You can technically use this extension on *any* site, as it will always automati
 However, I've built in additional autofill support for certain websites. When you visit one of these sites, a badge will appear on the
 moffsoft icon to indicate that additional autofill is available.
 
+- Forgejo instances (except codeberg for now ;3;): Title and author fields are autofilled from metadata. Currently, only `git.eleboog.com`
+triggers the supported site badge, but other Forgejo instances should work too.
 - GitHub: Title and author fields are autofilled from scraping the page.
 - Medium: Title, author, and date published fields are autofilled from the handy [`NewsArticle` JSON-LD schema](https://schema.org/NewsArticle)
 included on every page.
+- Substack: Title, author, and date published fields are autofilled form the handy [`NewsArticle` JSON-LD schema](https://schema.org/NewsArticle)
+included on every page. The supported site badge may not show for custom domains (i.e. not a `*.substack.com` url), but autofill 
+should still work.
 - Youtube: Title, author, and date published fields are autofilled from either the `watch7-content` metadata or the [`VideoObject` JSON-LD schema](https://schema.org/VideoObject).
-- Forgejo instances (except codeberg for now ;3;): Title and author fields are autofilled from metadata. Currently, only `git.eleboog.com`
-triggers the supported site badge, but other Forgejo instances should work too.
 
 ## Wait, what is this even for?
 
diff --git a/popup.js b/popup.js
index 5a51c7f..4794443 100644
--- a/popup.js
+++ b/popup.js
@@ -16,13 +16,13 @@ function parsePage() {
     if (jsonLDElem) {
         const jsonLDObj = JSON.parse(jsonLDElem.textContent);
         if (jsonLDObj['@type'] == 'NewsArticle') {  // medium, etc.
-            entry.publishedDate = jsonLDObj.datePublished?.slice(0, 19);
-            entry.author = jsonLDObj.author?.name;
+            entry.publishedDate = jsonLDObj.datePublished.slice(0, 19);
+            entry.author = jsonLDObj.author.name ?? jsonLDObj.author[0].name;
             entry.title = jsonLDObj.headline;
         }
         if (jsonLDObj['@type'] == 'VideoObject') {  // youtube, etc.
             entry.url = jsonLDObj['@id'];   // url fix
-            entry.publishedDate = jsonLDObj.uploadDate?.slice(0, 19);
+            entry.publishedDate = jsonLDObj.uploadDate.slice(0, 19);
             entry.author = jsonLDObj.author;
             entry.title = jsonLDObj.name;
         }
diff --git a/service-worker.js b/service-worker.js
index 9a16b19..fbbf5c5 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -8,6 +8,7 @@ chrome.tabs.onActivated.addListener((activeInfo) => {
             'youtube.com',
             'github.com',
             'git.eleboog.com',
+            'substack.com'
         ];
         
         let supportedSite = false;