diff --git a/bin/weewx/drivers/ultimeter.py b/bin/weewx/drivers/ultimeter.py
index e3a8471b..808b5e4b 100644
--- a/bin/weewx/drivers/ultimeter.py
+++ b/bin/weewx/drivers/ultimeter.py
@@ -58,9 +58,9 @@ import weewx.drivers
 from weeutil.weeutil import timestamp_to_string
 
 DRIVER_NAME = 'Ultimeter'
-DRIVER_VERSION = '0.15'
+DRIVER_VERSION = '0.16'
 
-INHG_PER_MBAR = 0.0295333727
+INHG_PER_MBAR = 0.0295299830714
 METER_PER_FOOT = 0.3048
 MILE_PER_KM = 0.621371
 
diff --git a/docs/changes.txt b/docs/changes.txt
index 48b98441..3722ae9f 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -19,6 +19,8 @@ Fixed anti-alias bug in genplot.  Issue #111.
 
 Corrected the conversion factor between inHg and mbar. Thanks to user Olivier.
 
+Corrected conversion factor for inHg and mbar in ultimeter driver.
+
 Plots longer than two years now use an x-axis increment of one year. Thanks to
 user Olivier!