diff --git a/Dockerfile b/Dockerfile
index b8af2ae..927be14 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ ADD "${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-noarch${S6_OVERLAY_
 
 
 # Second stage - Download s6-overlay platform-dependent binaries and unpack
-FROM --platform=${TARGETPLATFORM} alpine:3.19 AS downloader-s6-bin
+FROM --platform=${TARGETPLATFORM} alpine:3.20 AS downloader-s6-bin
 ARG TARGETPLATFORM
 ARG S6_OVERLAY_VERSION
 ARG S6_OVERLAY_RELEASE
@@ -26,7 +26,7 @@ RUN set -eux \
 
 
 # Third stage - Download s6-overlay platform-dependent hashes
-FROM --platform=${TARGETPLATFORM} alpine:3.19 AS downloader-s6-sha256-sums
+FROM --platform=${TARGETPLATFORM} alpine:3.20 AS downloader-s6-sha256-sums
 ARG TARGETPLATFORM
 ARG S6_OVERLAY_VERSION
 ARG S6_OVERLAY_RELEASE
@@ -46,7 +46,7 @@ RUN set -eux \
 
 
 # Fourth stage - Build rootfs from s6 parts
-FROM alpine:3.19 AS rootfs-builder
+FROM alpine:3.20 AS rootfs-builder
 
 COPY --from=downloader-s6-sha256-sums ["/SHA256SUMS", "/"]
 COPY --from=downloader-s6-base ["/s6overlay-base.tar.xz", "/s6overlay-base.tar.xz"]
diff --git a/Dockerfile.legacy b/Dockerfile.legacy
index 33890b7..0b15577 100644
--- a/Dockerfile.legacy
+++ b/Dockerfile.legacy
@@ -1,5 +1,5 @@
 # First stage - Download s6-overlay and unpack it
-FROM --platform=${TARGETPLATFORM} alpine:3.19 AS downloader
+FROM --platform=${TARGETPLATFORM} alpine:3.20 AS downloader
 
 ARG TARGETPLATFORM