diff --git a/src/frontend/apps/impress/src/features/docs/doc-editor/styles.tsx b/src/frontend/apps/impress/src/features/docs/doc-editor/styles.tsx
index 872cef50..8f421c8c 100644
--- a/src/frontend/apps/impress/src/features/docs/doc-editor/styles.tsx
+++ b/src/frontend/apps/impress/src/features/docs/doc-editor/styles.tsx
@@ -123,13 +123,13 @@ export const cssEditor = css`
     .bn-inline-content {
     text-decoration: none;
   }
-  h1 {
+  .bn-default-styles h1 {
     font-size: 1.875rem;
   }
-  h2 {
+  .bn-default-styles h2 {
     font-size: 1.5rem;
   }
-  h3 {
+  .bn-default-styles h3 {
     font-size: 1.25rem;
   }
   a {