diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3ae2ab37cad..c2d16fcd1dec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,8 @@ All notable changes to this project will be documented in this file.
 - ESP32 platform update from 2023.12.00 to 2024.01.00 (#20445)
 - Header `Host` is now collected by Webserver (#20446)
 - Webcam tweaks (#20451)
+- ESP8266 platform update from 2023.04.00 to 2024.01.00 (#20467)
+- ESP8266 Framework (Arduino Core) from v2.7.4.9 to v2.7.5 (#20467)
 
 ### Fixed
 - ESP32 Zigbee Aqara attributes (#20452)
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 09ffd3afb51b..d17e5cb3cfce 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -34,11 +34,11 @@ While fallback or downgrading is common practice it was never supported due to S
 
 ## Supported Core versions
 
-This release will be supported from ESP8266/Arduino library Core version **2.7.4.9** due to reported security and stability issues on previous Core version. This will also support gzipped binaries.
+This release will be supported from ESP8266/Arduino library Core version **2.7.5** due to reported security and stability issues on previous Core version. This will also support gzipped binaries.
 
 This release will be supported from ESP32/Arduino library Core version **2.0.14**.
 
-Support of ESP8266 Core versions before 2.7.4.9 and ESP32 Core versions before 2.0.14 have been removed.
+Support of ESP8266 Core versions before 2.7.5 and ESP32 Core versions before 2.0.14 have been removed.
 
 ## Support of TLS
 
@@ -55,7 +55,7 @@ Easy initial installation of Tasmota can be performed using the [Tasmota WebInst
 ## Provided Binary Downloads
 
 ### ESP8266 or ESP8285 based
-The following binary downloads have been compiled with ESP8266/Arduino library core version **2.7.4.9**.
+The following binary downloads have been compiled with ESP8266/Arduino library core version **2.7.5**.
 
 - **tasmota.bin** = The Tasmota version with most drivers for 1M+ flash. **RECOMMENDED RELEASE BINARY**
 - **tasmota-4M.bin** = The Tasmota version with most drivers and filesystem for 4M+ flash.
@@ -147,6 +147,8 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 - Refactoring of Berry `animate` module for WS2812 Leds [#20236](https://github.com/arendst/Tasmota/issues/20236)
 
 ### Changed
+- ESP8266 platform update from 2023.04.00 to 2024.01.00 [#20467](https://github.com/arendst/Tasmota/issues/20467)
+- ESP8266 Framework (Arduino Core) from v2.7.4.9 to v2.7.5 [#20467](https://github.com/arendst/Tasmota/issues/20467)
 - ESP32 platform update from 2023.11.01 to 2024.01.00 [#20445](https://github.com/arendst/Tasmota/issues/20445)
 - Renamed button "Consoles" to "Tools"
 - Support syslog updates every sleep or every second if `#define SYSLOG_UPDATE_SECOND` [#20260](https://github.com/arendst/Tasmota/issues/20260)