diff --git a/quartz/styles/base.scss b/quartz/styles/base.scss
index 9d553622..4aff2419 100644
--- a/quartz/styles/base.scss
+++ b/quartz/styles/base.scss
@@ -328,6 +328,7 @@ pre {
 
   &:has(> code.mermaid) {
     border: none;
+    position: relative;
   }
 
   & > code {