diff --git a/Dockerfile b/Dockerfile
index 801cf1e..def09d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 as builder
+FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 AS builder
 
 WORKDIR /src
 
diff --git a/Dockerfile.tor-daemon b/Dockerfile.tor-daemon
index 33ae344..a966ab5 100644
--- a/Dockerfile.tor-daemon
+++ b/Dockerfile.tor-daemon
@@ -1,4 +1,4 @@
 ARG TOR_VERSION="0.4.8.9-r1"
 ARG TOR_IMAGE="quay.io/bugfest/tor"
 
-FROM ${TOR_IMAGE}:${TOR_VERSION} as tor
+FROM ${TOR_IMAGE}:${TOR_VERSION} AS tor
diff --git a/Dockerfile.tor-daemon-manager b/Dockerfile.tor-daemon-manager
index 6c68b3a..d39e7b6 100644
--- a/Dockerfile.tor-daemon-manager
+++ b/Dockerfile.tor-daemon-manager
@@ -1,7 +1,7 @@
 ARG TOR_VERSION="0.4.8.9-r1"
 ARG TOR_IMAGE="quay.io/bugfest/tor"
 
-FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 as builder
+FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 AS builder
 
 WORKDIR /src
 
@@ -13,7 +13,7 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=cache,target=/go/pkg \
     CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -a -ldflags="-s -w" -o /out/tor-local-manager ./agents/tor/main.go
 
-FROM ${TOR_IMAGE}:${TOR_VERSION} as tor
+FROM ${TOR_IMAGE}:${TOR_VERSION} AS tor
 
 RUN mkdir -p /app
 COPY --from=builder --chmod=0555 /out/tor-local-manager /app
diff --git a/Dockerfile.tor-onionbalance-manager b/Dockerfile.tor-onionbalance-manager
index 9d58dae..f4ee2ea 100644
--- a/Dockerfile.tor-onionbalance-manager
+++ b/Dockerfile.tor-onionbalance-manager
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 as builder
+FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.20 AS builder
 
 WORKDIR /src
 
@@ -11,17 +11,17 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
     CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -a -ldflags="-s -w" -o /out/onionbalance-local-manager ./agents/onionbalance/main.go
 
 # package build
-FROM docker.io/library/alpine:3.17.2
+FROM docker.io/library/alpine:3.17.10
 
-ARG OB_VERSION="0.2.2"
+ARG OB_VERSION="0.2.3"
 
 RUN apk add --no-cache --update \
-        git=2.38.5-r0 \
-        py3-cryptography=38.0.3-r1 \
-        py3-pip=22.3.1-r1 \
-        py3-pycryptodomex=3.15.0-r0 \
-        py3-setproctitle=1.3.1-r0 \
-        py3-wheel=0.38.4-r0 \
+        git \
+        py3-cryptography \
+        py3-pip \
+        py3-pycryptodomex \
+        py3-setproctitle \
+        py3-wheel \
     && python3 -m pip install --no-cache-dir git+https://gitlab.torproject.org/tpo/core/onionbalance.git@${OB_VERSION}
 
 WORKDIR /app