diff --git a/packages/extended-text-entry/src/annotation/annotation-editor.jsx b/packages/extended-text-entry/src/annotation/annotation-editor.jsx
index d807159bbf..85a85fb300 100644
--- a/packages/extended-text-entry/src/annotation/annotation-editor.jsx
+++ b/packages/extended-text-entry/src/annotation/annotation-editor.jsx
@@ -590,6 +590,9 @@ class AnnotationEditor extends React.Component {
               textAlign: {
                 disabled: true,
               },
+              h3: {
+                disabled: true,
+              },
             }}
           />
         </CommentContainer>
diff --git a/packages/extended-text-entry/src/main.jsx b/packages/extended-text-entry/src/main.jsx
index 20632d84b8..386429273b 100644
--- a/packages/extended-text-entry/src/main.jsx
+++ b/packages/extended-text-entry/src/main.jsx
@@ -181,6 +181,9 @@ export class Main extends React.Component {
               textAlign: {
                 disabled: true,
               },
+              h3: {
+                disabled: true,
+              },
               separateParagraphs: { disabled: false },
               ul_list: { disabled: true },
               ol_list: { disabled: true },