diff --git a/AGENTS.md b/AGENTS.md
index 0e66a9a..0c70058 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -313,7 +313,7 @@ After successful refactoring:
 -   Platform modules: `__init__.py`, `sensor.py` (deprecated, now `sensor/`), `binary_sensor.py` (deprecated, now `binary_sensor/`), future platforms
 -   Core integration files: `const.py`, `manifest.json`, `services.yaml`, `diagnostics.py`, `data.py`
 -   Translation directories: `translations/`, `custom_translations/`
--   Brand images: `brand/` (icon.png, dark_icon.png, logo.png, dark_logo.png + `@2x` variants) — served via HA brands proxy API (HA ≥ 2026.3), silently ignored on older versions
+-   Brand images: `brand/` (icon.png, dark_icon.png, logo.png, dark_logo.png + `@2x` variants) — served via HA brands proxy API (HA ≥ 2026.4), silently ignored on older versions
 
 **❌ PROHIBITED in root:**
 -   Utility modules (use `/utils/` package instead)
diff --git a/scripts/setup/bootstrap b/scripts/setup/bootstrap
index b5455f3..9bf072b 100755
--- a/scripts/setup/bootstrap
+++ b/scripts/setup/bootstrap
@@ -54,8 +54,8 @@ uv pip install --requirement requirements.txt
 ###############################################################################
 
 # HA_VERSION can be overridden from the environment, e.g.:
-#   HA_VERSION=2026.3.4 script/bootstrap
-HA_VERSION=${HA_VERSION:-"2026.3.4"}
+#   HA_VERSION=2026.4.1 script/bootstrap
+HA_VERSION=${HA_VERSION:-"2026.4.1"}
 HA_CORE_BASE_URL="https://raw.githubusercontent.com/home-assistant/core/${HA_VERSION}"
 HA_TMP_DIR="$HOME/.ha_requirements"