diff --git a/src/client/theme-default/styles/components/custom-block.css b/src/client/theme-default/styles/components/custom-block.css
index 81bc71e4..16f0564f 100644
--- a/src/client/theme-default/styles/components/custom-block.css
+++ b/src/client/theme-default/styles/components/custom-block.css
@@ -68,6 +68,7 @@
 .custom-block.details summary {
   margin: 0 0 8px;
   font-weight: 700;
+  cursor: pointer;
 }
 
 .custom-block.details summary + p {