diff --git a/README.md b/README.md
index f8aa7e6..ae7e69e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# PV Opt: Home Assistant Solar/Battery Optimiser v3.9.0
+# PV Opt: Home Assistant Solar/Battery Optimiser v3.9.1
 
 Solar / Battery Charging Optimisation for Home Assistant. This appDaemon application attempts to optimise charging and discharging of a home solar/battery system to minimise cost electricity cost on a daily basis using freely available solar forecast data from SolCast. This is particularly beneficial for Octopus Agile but is also benefeficial for other time-of-use tariffs such as Octopus Flux or simple Economy 7.
 
diff --git a/apps/pv_opt/pv_opt.py b/apps/pv_opt/pv_opt.py
index 9934a3b..f49ffe8 100644
--- a/apps/pv_opt/pv_opt.py
+++ b/apps/pv_opt/pv_opt.py
@@ -20,7 +20,7 @@
 #
 USE_TARIFF = True
 
-VERSION = "3.9.0"
+VERSION = "3.9.1"
 DEBUG = False
 
 DATE_TIME_FORMAT_LONG = "%Y-%m-%d %H:%M:%S%z"