diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c4df2c..ebd7924 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,13 +11,69 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - All commands according to data sheet
 
-## [0.1.0] - 2021-2-1
+### Changed
+
+Breaking changes
+- The file and class name has changed from SensirionI2CScd4x to SensirionI2cScd4x (the "c" in I2c is now in lower case)
+- begin(TwoWire& i2cBus, uint8_t i2cAddress); now takes a second argument for the i2c address
+- all methods that have been named xxxTicks are now named xxxRaw
+- getDataReadyFlag has been renamed to getDataReadyStatus
+- get/setAmbientPressure(uint32_t& aAmbientPressure); now takes the ambient pressure in Pa as uint32_t
+- getSerialNumber now returns uint64_t
+
+
+## [0.4.0] - 2023-03-06
+
+### Added
+- Methods for ASC (Automatic Self Calibration)
+
+### Breaking changes
+- Renamed getDataReadyStatus to getDataReadyFlag 
+
+### Fixed
+- RH/T conversion now uses correct constant: `2^16 - 1`
+- Fixed a few comments
+- Initializing the output variables to zero 
+
+## [0.3.1] - 2021-04-30
+
+### Changed
+
+* Increase timing for single shot from 1350ms to 5000ms
+* Increase timing for self test from 5500ms to 10000ms
+
+
+## [0.3.0] - 2021-03-01
 
 ### Added
+- Convenience interfaces taking care of unit conversion to and from ticks.
+
+### Fixed
+- wake-up interface handles missing ACK from sensor on wake up.
+
+
+## [0.2.0] - 2021-02-10
+
+### Changed
+
+* Updated Sensirion Core library version from 0.4.0 to 0.4.2. This includes the
+  renaming of the library header file from `SensirionCoreArduinoLibrary.h` to
+  `SensirionCore.h`.
+* Define `SCD4X_I2C_ADDRESS` as hex instead of dec (unchanged value).
+
+### Added
+
+* Added warning about limited EEPROM write cycles.
+
+## [0.1.0] - 2021-02-05
+
+Initial release
 
-- Initial version
-- Check latest 0.x.x version for changelog prior to version 1.0.0
 
 [Unreleased]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/1.0.0...HEAD
-[1.0.0]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.1.0...1.0.0
+[1.0.0]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.4.0...1.0.0
+[0.4.0]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.3.1...0.4.0
+[0.3.1]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.3.0...0.3.1
+[0.3.0]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.2.0...0.3.0
+[0.2.0]: https://github.com/Sensirion/arduino-i2c-scd4x/compare/0.1.0...0.2.0
 [0.1.0]: https://github.com/Sensirion/arduino-i2c-scd4x/releases/tag/0.1.0
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