diff --git a/Dockerfile b/Dockerfile
index 4df8cda..a747823 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG PUREFTPD_VERSION=1.0.50
-ARG ALPINE_VERSION=3.17
+ARG ALPINE_VERSION=3.18
 ARG XX_VERSION=1.2.1
 
 FROM --platform=${BUILDPLATFORM} crazymax/alpine-s6:${ALPINE_VERSION}-2.2.0.3 AS src
diff --git a/Dockerfile-1.0.47 b/Dockerfile-1.0.47
index 3d28f0f..cb6d8e0 100644
--- a/Dockerfile-1.0.47
+++ b/Dockerfile-1.0.47
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG PUREFTPD_VERSION=1.0.47
-ARG ALPINE_VERSION=3.17
+ARG ALPINE_VERSION=3.18
 
 FROM --platform=${BUILDPLATFORM:-linux/amd64} crazymax/alpine-s6:${ALPINE_VERSION}-2.2.0.3 AS download
 RUN apk --update --no-cache add curl patch tar