diff --git a/src/components/Editor.tsx b/src/components/Editor.tsx
index 3b7b22f..fc0cce1 100644
--- a/src/components/Editor.tsx
+++ b/src/components/Editor.tsx
@@ -12,6 +12,7 @@ import {
 import {
   eq,
   monoid,
+  number,
   option,
   ord,
   readonlyArray,
@@ -55,6 +56,10 @@ const eqContentBlock = monoid.concatAll(eq.getMonoid<ContentBlock>())([
     string.Eq,
     eq.contramap((b) => b.getText())
   ),
+  pipe(
+    number.Eq,
+    eq.contramap((b) => b.getDepth())
+  ),
 ]);
 const getBlocks = (editorState: EditorState) =>
   pipe(