diff --git a/packages/stompman/test_stompman/test_subscription.py b/packages/stompman/test_stompman/test_subscription.py
index 488d114..27a3054 100644
--- a/packages/stompman/test_stompman/test_subscription.py
+++ b/packages/stompman/test_stompman/test_subscription.py
@@ -235,7 +235,7 @@ async def test_client_listen_ack_with_no_ack_header(
     monkeypatch.setattr(stompman.subscription, "_make_subscription_id", mock.Mock(return_value=subscription_id))
 
     message_frame = build_dataclass(MessageFrame, headers={"subscription": subscription_id})
-    message_frame.headers.pop("ack")
+    message_frame.headers.pop("ack", None)
 
     connection_class, collected_frames = create_spying_connection(*get_read_frames_with_lifespan([message_frame]))
     message_handler = mock.AsyncMock(side_effect=side_effect)
diff --git a/pyproject.toml b/pyproject.toml
index 0efb7af..1706504 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,16 +5,16 @@ version = "0"
 
 [dependency-groups]
 dev = [
-    "anyio==4.11.0",
-    "faker==37.12.0",
-    "hypothesis==6.142.5",
-    "mypy==1.18.2",
-    "polyfactory==2.22.3",
-    "pytest==8.4.2",
+    "anyio==4.12.0",
+    "faker==38.2.0",
+    "hypothesis==6.148.4",
+    "mypy==1.19.0",
+    "polyfactory==3.1.0",
+    "pytest==9.0.1",
     "pytest-cov==7.0.0",
     "pytest-timeout==2.4.0",
     "pytest-rerunfailures==16.1",
-    "ruff==0.14.3",
+    "ruff==0.14.7",
     "uvloop==0.22.1",
 ]