diff --git a/assets/js/src/form_editor/blocks/heading/heading.jsx b/assets/js/src/form_editor/blocks/heading/heading.jsx
index a1ac217cbc..e17ffb8f27 100644
--- a/assets/js/src/form_editor/blocks/heading/heading.jsx
+++ b/assets/js/src/form_editor/blocks/heading/heading.jsx
@@ -14,6 +14,10 @@ const settings = {
   ...heading.settings,
   ...settingsReset,
   category: 'layout',
+  supports: {
+    ...heading.supports,
+    html: false,
+  },
 };
 
 export { settings };
diff --git a/assets/js/src/form_editor/blocks/paragraph/paragraph.tsx b/assets/js/src/form_editor/blocks/paragraph/paragraph.tsx
index 9b9ee19cac..3424ca9d05 100644
--- a/assets/js/src/form_editor/blocks/paragraph/paragraph.tsx
+++ b/assets/js/src/form_editor/blocks/paragraph/paragraph.tsx
@@ -13,6 +13,10 @@ const settings = {
   ...paragraph.settings,
   ...settingsReset,
   category: 'layout',
+  supports: {
+    ...paragraph.supports,
+    html: false,
+  },
 };
 
 export { settings };