diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6ad1c678151..5e33f19948b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -40,7 +40,7 @@ env:
   CACHE_VERSION: 2
   UV_CACHE_VERSION: 1
   MYPY_CACHE_VERSION: 1
-  HA_SHORT_VERSION: "2025.12"
+  HA_SHORT_VERSION: "2026.1"
   DEFAULT_PYTHON: "3.13"
   ALL_PYTHON_VERSIONS: "['3.13', '3.14']"
   # 10.3 is the oldest supported version
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 0ff91587e86..01da32e47d9 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -15,8 +15,8 @@ if TYPE_CHECKING:
     from .helpers.typing import NoEventData
 
 APPLICATION_NAME: Final = "HomeAssistant"
-MAJOR_VERSION: Final = 2025
-MINOR_VERSION: Final = 12
+MAJOR_VERSION: Final = 2026
+MINOR_VERSION: Final = 1
 PATCH_VERSION: Final = "0.dev0"
 __short_version__: Final = f"{MAJOR_VERSION}.{MINOR_VERSION}"
 __version__: Final = f"{__short_version__}.{PATCH_VERSION}"
diff --git a/pyproject.toml b/pyproject.toml
index 98190bd1368..2c9d07a92c7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "homeassistant"
-version = "2025.12.0.dev0"
+version = "2026.1.0.dev0"
 license = "Apache-2.0"
 license-files = ["LICENSE*", "homeassistant/backports/LICENSE*"]
 description = "Open-source home automation platform running on Python 3."
@@ -830,7 +830,7 @@ ignore = [
   # Disabled because ruff does not understand type of __all__ generated by a function
   "PLE0605",
 
-  "FURB116"
+  "FURB116",
 ]
 
 [tool.ruff.lint.flake8-import-conventions.extend-aliases]