diff --git a/.clang-tidy.hash b/.clang-tidy.hash
index ab354259e3..0b1e757922 100644
--- a/.clang-tidy.hash
+++ b/.clang-tidy.hash
@@ -1 +1 @@
-069fa9526c52f7c580a9ec17c7678d12f142221387e9b561c18f95394d4629a3
+ad8131b65de630ca9f89d34d35f32e5c858fc2a7b310227e5edaf946e942af0f
diff --git a/esphome/components/libretiny/__init__.py b/esphome/components/libretiny/__init__.py
index 553179beec..0f8520a019 100644
--- a/esphome/components/libretiny/__init__.py
+++ b/esphome/components/libretiny/__init__.py
@@ -193,14 +193,14 @@ def _notify_old_style(config):
 # The dev and latest branches will be at *least* this version, which is what matters.
 # Use GitHub releases directly to avoid PlatformIO moderation delays.
 ARDUINO_VERSIONS = {
-    "dev": (cv.Version(1, 11, 0), "https://github.com/libretiny-eu/libretiny.git"),
+    "dev": (cv.Version(1, 12, 0), "https://github.com/libretiny-eu/libretiny.git"),
     "latest": (
-        cv.Version(1, 11, 0),
-        "https://github.com/libretiny-eu/libretiny.git#v1.11.0",
+        cv.Version(1, 12, 0),
+        "https://github.com/libretiny-eu/libretiny.git#v1.12.0",
     ),
     "recommended": (
-        cv.Version(1, 11, 0),
-        "https://github.com/libretiny-eu/libretiny.git#v1.11.0",
+        cv.Version(1, 12, 0),
+        "https://github.com/libretiny-eu/libretiny.git#v1.12.0",
     ),
 }
 
diff --git a/platformio.ini b/platformio.ini
index bb0de3c2b1..9ccbd5047f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -213,7 +213,7 @@ build_unflags =
 ; This are common settings for the LibreTiny (all variants) using Arduino.
 [common:libretiny-arduino]
 extends = common:arduino
-platform = https://github.com/libretiny-eu/libretiny.git#v1.11.0
+platform = https://github.com/libretiny-eu/libretiny.git#v1.12.0
 framework = arduino
 lib_compat_mode = soft
 lib_deps =