diff --git a/requirements-dev-3.11.txt b/requirements-dev-3.11.txt
index 5aeb051..48ff658 100644
--- a/requirements-dev-3.11.txt
+++ b/requirements-dev-3.11.txt
@@ -1,5 +1,5 @@
 homeassistant==2024.3.3
-mypy-dev==1.11.0a6
+mypy-dev==1.11.0a9
 pydantic==1.10.15
 pre-commit==3.7.1
 ruff==0.4.9
diff --git a/requirements-dev-3.12.txt b/requirements-dev-3.12.txt
index a5ca378..e8bdcb9 100644
--- a/requirements-dev-3.12.txt
+++ b/requirements-dev-3.12.txt
@@ -1,5 +1,5 @@
 homeassistant==2024.5.1
-mypy-dev==1.11.0a6
+mypy-dev==1.11.0a9
 pydantic==1.10.15
 pre-commit==3.7.1
 ruff==0.4.9