diff --git a/theme/37c3/theme.json b/theme/37c3/theme.json
index 3665cd454..018ef40e9 100644
--- a/theme/37c3/theme.json
+++ b/theme/37c3/theme.json
@@ -39,7 +39,7 @@
     "post-separator-width": "80%",
     "post-separator-height": "10%",
     "column-left-header-background": "#2d42ffff",
-    "banner-height": "18vh",
+    "banner-height": "13vh",
     "banner-height-mobile": "10vh",
     "focus-color": "blue",
     "font-page-dash-tiny": "16px",