diff --git a/Dockerfile b/Dockerfile
index a8bbcb6..8b6093b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.10.5-slim-bullseye as install
 
 ARG WEEWX_UID=421
 ENV WEEWX_HOME="/home/weewx"
-ENV WEEWX_VERSION="4.8.0"
+ENV WEEWX_VERSION="4.9.1"
 ENV ARCHIVE="weewx-${WEEWX_VERSION}.tar.gz"
 ENV WEEWX_WDC_VERSION="v2.3.1"