diff --git a/28/dind-rootless/Dockerfile b/28/dind-rootless/Dockerfile
index abc087072..cfa67b5e3 100644
--- a/28/dind-rootless/Dockerfile
+++ b/28/dind-rootless/Dockerfile
@@ -8,7 +8,8 @@ FROM docker:28-dind
 
 # busybox "ip" is insufficient:
 #   [rootlesskit:child ] error: executing [[ip tuntap add name tap0 mode tap] [ip link set tap0 address 02:50:00:00:00:01]]: exit status 1
-RUN apk add --no-cache iproute2 fuse-overlayfs
+# slirp4netns can be selected as rootlesskit's net driver using "-e DOCKERD_ROOTLESS_ROOTLESSKIT_NET=slirp4netns"
+RUN apk add --no-cache iproute2 fuse-overlayfs slirp4netns
 
 # "/run/user/UID" will be used by default as the value of XDG_RUNTIME_DIR
 RUN mkdir /run/user && chmod 1777 /run/user
diff --git a/Dockerfile-dind-rootless.template b/Dockerfile-dind-rootless.template
index 8668b343a..6f6d5c2a0 100644
--- a/Dockerfile-dind-rootless.template
+++ b/Dockerfile-dind-rootless.template
@@ -3,7 +3,8 @@ FROM docker:{{ env.version }}-dind
 
 # busybox "ip" is insufficient:
 #   [rootlesskit:child ] error: executing [[ip tuntap add name tap0 mode tap] [ip link set tap0 address 02:50:00:00:00:01]]: exit status 1
-RUN apk add --no-cache iproute2 fuse-overlayfs
+# slirp4netns can be selected as rootlesskit's net driver using "-e DOCKERD_ROOTLESS_ROOTLESSKIT_NET=slirp4netns"
+RUN apk add --no-cache iproute2 fuse-overlayfs slirp4netns
 
 # "/run/user/UID" will be used by default as the value of XDG_RUNTIME_DIR
 RUN mkdir /run/user && chmod 1777 /run/user