diff --git a/slides/dumux_course.css b/slides/dumux_course.css
index e2914b162203b576312b04410ac269b26d50a02a..73ef7c739aeed9e838164e09bd80ed71ef621d24 100644
--- a/slides/dumux_course.css
+++ b/slides/dumux_course.css
@@ -19,6 +19,14 @@
     font-size: var(--font-size);
 }
 
+.reveal pre {
+    width: 100%;
+}
+
+.reveal pre code {
+    max-height: 600px;
+}
+
 .reveal ul {
     font-size: var(--font-size);
 }