diff --git a/Dockerfile b/Dockerfile
index 6d82e54..1550df8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3
+FROM alpine:3.19
 
 ENV MUSL_LOCPATH="/usr/share/i18n/locales/musl"
 
@@ -7,7 +7,7 @@ ENTRYPOINT ["python", "/srv/e-paper/main.py"]
 WORKDIR /srv/e-paper
 VOLUME /data
 
-RUN apk add --no-cache musl-locales musl-locales-lang python3 py3-cairosvg py3-pillow py3-pip py3-pygal tzdata && pip install --upgrade icalendar
+RUN apk add --no-cache musl-locales musl-locales-lang python3 py3-cairosvg py3-icalendar py3-pillow py3-pip py3-pygal tzdata
 
 ADD https://github.com/adobe-fonts/source-sans/raw/release/OTF/SourceSans3-Bold.otf /usr/share/fonts/source-sans/SourceSans3-Bold.otf
 ADD https://github.com/adobe-fonts/source-sans/raw/release/OTF/SourceSans3-It.otf /usr/share/fonts/source-sans/SourceSans3-It.otf