diff --git a/python/pycrdt/_pycrdt.pyi b/python/pycrdt/_pycrdt.pyi
index b3bae5b..f7095fd 100644
--- a/python/pycrdt/_pycrdt.pyi
+++ b/python/pycrdt/_pycrdt.pyi
@@ -58,6 +58,10 @@ class TransactionEvent:
     """Event generated by `Doc.observe` method. Emitted during transaction commit
     phase."""
 
+    @property
+    def update(self) -> bytes:
+        """The emitted binary update"""
+
 class SubdocsEvent:
     """Event generated by `Doc.observe_subdocs` method. Emitted during transaction commit
     phase."""