diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f9193343..0646f62ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ All notable changes to this project will be documented in this file.
 - Domoticz supports persistent settings for all relays, keys and switches when filesystem `#define USE_UFILESYS` is enabled
 - ESP32 Platform from 2025.07.30 to 2025.07.31, Framework (Arduino Core) from v3.1.3.250707 to v3.1.3.250712 and IDF from v5.3.3.250707 to v5.3.3.250707 (#23685)
 - ESP8266 platform update from 2025.05.00 to 2025.07.00 (#23700)
+- OpenTherm library from v0.9.0 to v1.1.5 (#23704)
 
 ### Fixed
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 9bb93b789..195d06ff8 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -132,6 +132,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 ### Changed
 - ESP32 Platform from 2025.05.30 to 2025.07.31, Framework (Arduino Core) from v3.1.3.250504 to v3.1.3.250712 and IDF from v5.3.3.250501 to v5.3.3.250707 [#23685](https://github.com/arendst/Tasmota/issues/23685)
 - ESP8266 platform update from 2025.05.00 to 2025.07.00 [#23700](https://github.com/arendst/Tasmota/issues/23700)
+- OpenTherm library from v0.9.0 to v1.1.5 [#23704](https://github.com/arendst/Tasmota/issues/23704)
 - Library names [#23560](https://github.com/arendst/Tasmota/issues/23560)
 - CSS uses named colors variables [#23597](https://github.com/arendst/Tasmota/issues/23597)
 - VEML6070 and AHT2x device detection [#23581](https://github.com/arendst/Tasmota/issues/23581)
diff --git a/lib/lib_div/OpenTherm-1.1.5/LICENSE b/lib/lib_div/OpenTherm/LICENSE
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/LICENSE
rename to lib/lib_div/OpenTherm/LICENSE
diff --git a/lib/lib_div/OpenTherm-1.1.5/README.md b/lib/lib_div/OpenTherm/README.md
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/README.md
rename to lib/lib_div/OpenTherm/README.md
diff --git a/lib/lib_div/OpenTherm-1.1.5/keywords.txt b/lib/lib_div/OpenTherm/keywords.txt
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/keywords.txt
rename to lib/lib_div/OpenTherm/keywords.txt
diff --git a/lib/lib_div/OpenTherm-1.1.5/library.properties b/lib/lib_div/OpenTherm/library.properties
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/library.properties
rename to lib/lib_div/OpenTherm/library.properties
diff --git a/lib/lib_div/OpenTherm-1.1.5/src/OpenTherm.cpp b/lib/lib_div/OpenTherm/src/OpenTherm.cpp
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/src/OpenTherm.cpp
rename to lib/lib_div/OpenTherm/src/OpenTherm.cpp
diff --git a/lib/lib_div/OpenTherm-1.1.5/src/OpenTherm.h b/lib/lib_div/OpenTherm/src/OpenTherm.h
similarity index 100%
rename from lib/lib_div/OpenTherm-1.1.5/src/OpenTherm.h
rename to lib/lib_div/OpenTherm/src/OpenTherm.h