diff --git a/docker/Dockerfile.agent.linux.amd64 b/docker/Dockerfile.agent.linux.amd64
index bb9899a88..a13e86fdf 100644
--- a/docker/Dockerfile.agent.linux.amd64
+++ b/docker/Dockerfile.agent.linux.amd64
@@ -1,7 +1,7 @@
-FROM alpine:3.11 as alpine
+FROM alpine:3.19 as alpine
 RUN apk add -U --no-cache ca-certificates tzdata
 
-FROM alpine:3.11
+FROM alpine:3.19
 ENV GODEBUG netdns=go
 ENV DRONE_RUNNER_OS=linux
 ENV DRONE_RUNNER_ARCH=amd64
@@ -9,7 +9,7 @@ ENV DRONE_RUNNER_PLATFORM=linux/amd64
 ENV DRONE_RUNNER_CAPACITY=1
 ADD release/linux/amd64/drone-agent /bin/
 
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+RUN if [[ ! -e /etc/nsswitch.conf ]] ; then echo 'hosts: files dns' > /etc/nsswitch.conf ; fi
 
 COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=alpine /usr/share/zoneinfo /usr/share/zoneinfo
diff --git a/docker/Dockerfile.controller.linux.amd64 b/docker/Dockerfile.controller.linux.amd64
index 8161dc2cc..6d2a41726 100644
--- a/docker/Dockerfile.controller.linux.amd64
+++ b/docker/Dockerfile.controller.linux.amd64
@@ -1,7 +1,7 @@
-FROM alpine:3.11 as alpine
+FROM alpine:3.19 as alpine
 RUN apk add -U --no-cache ca-certificates tzdata
 
-FROM alpine:3.11
+FROM alpine:3.19
 ENV GODEBUG netdns=go
 ENV DRONE_RUNNER_OS=linux
 ENV DRONE_RUNNER_ARCH=amd64
diff --git a/docker/Dockerfile.server.linux.amd64 b/docker/Dockerfile.server.linux.amd64
index 1f4d604b1..2a9457ad7 100644
--- a/docker/Dockerfile.server.linux.amd64
+++ b/docker/Dockerfile.server.linux.amd64
@@ -1,13 +1,13 @@
 # docker build --rm -f docker/Dockerfile -t drone/drone .
 
-FROM alpine:3.11 as alpine
+FROM alpine:3.19 as alpine
 RUN apk add -U --no-cache ca-certificates tzdata
 
-FROM alpine:3.11
+FROM alpine:3.19
 EXPOSE 80 443
 VOLUME /data
 
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+RUN if [[ ! -e /etc/nsswitch.conf ]] ; then echo 'hosts: files dns' > /etc/nsswitch.conf ; fi
 
 ENV GODEBUG netdns=go
 ENV XDG_CACHE_HOME /data