diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9772777..199e92d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.1] - 2024-03-30
+
+### Fixed
+
+- Bypass open hours in function `get_operating_hours` used the wrong entries from the dataset.
+
 ## [1.1.0] - 2023-08-06
 
 ### Added
diff --git a/src/whr930.py b/src/whr930.py
index e865b3f..4a35cdf 100755
--- a/src/whr930.py
+++ b/src/whr930.py
@@ -722,7 +722,7 @@ def get_operating_hours():
             Level3Hours = int(data[24], 16) + int(data[25], 16) + int(data[26], 16)
             FrostProtectionHours = int(data[16], 16) + int(data[17], 16)
             PreHeatingHours = int(data[18], 16) + int(data[19], 16)
-            BypassOpenHours = int(data[14], 16) + int(data[15], 16)
+            BypassOpenHours = int(data[20], 16) + int(data[21], 16)
             FilterHours = int(data[22], 16) + int(data[23], 16)
 
             publish_message(msg=Level0Hours, mqtt_path="house/2/attic/wtw/level0_hours")