diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 283d703..245263d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.8.3
+    rev: v0.8.4
     hooks:
       - id: ruff
         args: [--fix, --show-fixes]
diff --git a/python/pycrdt/_sync.py b/python/pycrdt/_sync.py
index 79939ef..24a8d53 100644
--- a/python/pycrdt/_sync.py
+++ b/python/pycrdt/_sync.py
@@ -15,8 +15,8 @@ class YMessageType(IntEnum):
         AWARENESS: A message type used for the awareness protocol.
     """
 
-    SYNC: int = 0
-    AWARENESS: int = 1
+    SYNC = 0
+    AWARENESS = 1
 
 
 class YSyncMessageType(IntEnum):
@@ -31,9 +31,9 @@ class YSyncMessageType(IntEnum):
         SYNC_UPDATE: A synchronization message type used to send document updates.
     """
 
-    SYNC_STEP1: int = 0
-    SYNC_STEP2: int = 1
-    SYNC_UPDATE: int = 2
+    SYNC_STEP1 = 0
+    SYNC_STEP2 = 1
+    SYNC_UPDATE = 2
 
 
 def write_var_uint(num: int) -> bytes: