diff --git a/slides/dumux_course_header.html b/slides/dumux_course_header.html
index 7dd8698e460f7c34b6fb8333016a1192c4c6a7a1..57d4146013914b426dc582bd9931650e817b3404 100644
--- a/slides/dumux_course_header.html
+++ b/slides/dumux_course_header.html
@@ -1,4 +1,4 @@
-<script>
+<style>
 @import url("https://fonts.googleapis.com/css?family=Nanum+Gothic");
 
 :root {
@@ -46,4 +46,4 @@
     font-size: 1.75em;
     font-family: var(--font-family), sans-serif;
 }
-</script>
+</style>