diff --git a/config/filters/index.js b/config/filters/index.js
index 9d47a7ac..05dfe4bf 100644
--- a/config/filters/index.js
+++ b/config/filters/index.js
@@ -80,8 +80,8 @@ export default {
 
   // mastodon
   mastoUsername: (url) => {
-    const url = new URL(post.author.mastodon)
-    return `${url.pathname.replace('/', '')}@${url.host}`
+    const parsedUrl = new URL(url)
+    return `${parsedUrl.pathname.replace('/', '')}@${parsedUrl.host}`
   },
 
   // feeds
diff --git a/package-lock.json b/package-lock.json
index a14f83d6..7f686727 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "coryd.dev",
-  "version": "19.9.18",
+  "version": "19.9.19",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "coryd.dev",
-      "version": "19.9.18",
+      "version": "19.9.19",
       "license": "MIT",
       "dependencies": {
         "@cdransf/api-text": "^1.4.0",
diff --git a/package.json b/package.json
index 04fdea5c..aacec2dc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "coryd.dev",
-  "version": "19.9.18",
+  "version": "19.9.19",
   "description": "The source for my personal site. Built using 11ty.",
   "type": "module",
   "scripts": {