diff --git a/Dockerfile b/Dockerfile
index 656a7c2..f445729 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM node:18 AS frontend-builder
 COPY ./maubot/management/frontend /frontend
 RUN cd /frontend && yarn --prod && yarn build
 
-FROM alpine:3.17
+FROM alpine:3.18
 
 RUN apk add --no-cache \
         python3 py3-pip py3-setuptools py3-wheel \
diff --git a/Dockerfile.ci b/Dockerfile.ci
index d3a7e32..82e2afc 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -1,4 +1,4 @@
-FROM alpine:3.17
+FROM alpine:3.18
 
 RUN apk add --no-cache \
         python3 py3-pip py3-setuptools py3-wheel \