diff --git a/assets/sass/_theme/design-system/header.sass b/assets/sass/_theme/design-system/header.sass
index a898badc0751f595a4cc0282110893d619b1c6d3..57605fdff0f442fb2e5de138230c6e26c9cd1039 100644
--- a/assets/sass/_theme/design-system/header.sass
+++ b/assets/sass/_theme/design-system/header.sass
@@ -5,6 +5,7 @@ header#document-header
     position: fixed
     left: 0
     top: 0
+    transition: transform $header-sticky-transition, background $header-sticky-transition
     width: 100%
     z-index: $zindex-header
     @include media-breakpoint-down(desktop)