diff --git a/static/src/scss/_blocks.scss b/static/src/scss/_blocks.scss
index 61eb32d..a5168a3 100644
--- a/static/src/scss/_blocks.scss
+++ b/static/src/scss/_blocks.scss
@@ -11,7 +11,8 @@
   }
 }
 
-div.block-image {
+div.block-image,
+div.block-mermaid {
   figcaption {
     font-size: 85%;
     margin-top: 5px;