diff --git a/.eleventy.js b/.eleventy.js
index 31d2267..5133060 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -10,7 +10,7 @@ module.exports = function(eleventyConfig) {
       return DateTime.fromJSDate(value).toLocaleString(DateTime.DATETIME_FULL)
     });
 
-    eleventyConfig.addFilter("copyrightyear", function() {
+    eleventyConfig.addFilter("copyrightyear", function(value) {
       return DateTime.Now().toLocaleString({ year: 'numeric'})
     });
 
diff --git a/index.njk b/index.njk
index d0e3c78..e403765 100644
--- a/index.njk
+++ b/index.njk
@@ -103,8 +103,8 @@ date: Last Modified
     <br/><br/>
     This page makes due without any cookies, frontend javascript, tracking and databases 
     in the effort to make the web quick and usable again :)
-    <br/>This page was last updated at {{ page.date | timestamp }}
-    <br/><br/>
-    Copyright Laura Kalb {{ copyrightyear }}
+    <br/><br/>This page was last updated at {{ page.date | timestamp }}
+    <br/>
+    Copyright Laura Kalb {{ date | copyrightyear }}
     <br/><br/><a href="/impressum.html">Impressum und Datenschutzerklärung</a>
 </p>