diff --git a/.drone.yml b/.drone.yml
index fbf9aae..ca58e25 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -30,11 +30,6 @@ services:
     volumes:
       - name: dockersock
         path: /var/run
-    command:
-    - dockerd-entrypoint.sh
-    - dockerd
-    - --host=unix:///var/run/docker.sock
-    - --mtu=1492
 
 volumes:
   - name: dockersock
@@ -73,11 +68,6 @@ services:
     volumes:
       - name: dockersock
         path: /var/run
-    command:
-    - dockerd-entrypoint.sh
-    - dockerd
-    - --host=unix:///var/run/docker.sock
-    - --mtu=1492
 
 volumes:
   - name: dockersock
diff --git a/Dockerfile b/Dockerfile
index 9d66449..efd31b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,23 +1,16 @@
-FROM debian:trixie-slim
+FROM debian:bookworm-slim
 
 RUN set -eux && \
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get upgrade -y && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         openssh-server \
-        sudo \
         locales \
         curl \
         telnet \
         net-tools \
         screen \
         vim \
-        git \
-        man \
-        less \
-        bind9-dnsutils \
-        unzip \
-        rsync \
     && \
     rm -rf /var/lib/apt/lists/* && \
     rm /etc/ssh/ssh_host_*key* && \
diff --git a/README.md b/README.md
index fb62521..0d571bb 100644
--- a/README.md
+++ b/README.md
@@ -26,10 +26,10 @@
 $ docker run -it \
     --name jumpbox \
     -v $(pwd)/jumpbox:/var/lib/jumpbox \
-    -e "ROOT_AUTHORIZED_KEYS=/var/lib/jumpbox/authorized_keys" \
-    -e "HOSTKEYS=/var/lib/jumpbox/ssh_host_ed25519_key;/var/lib/jumpbox/ssh_host_rsa_key" \
-    -e "USERADD=jumpbox:1000:1000:/bin/bash" \
-    -e "GROUPADD=jumpbox:1000" \
+    -e "ROOT_AUTHORIZED_KEYS=/var/lib/jumpbox/authorized_keys"
+    -e "HOSTKEYS=/var/lib/jumpbox/ssh_host_ed25519_key;/var/lib/jumpbox/ssh_host_rsa_key"
+    -e "USERADD=jumpbox:1000:1000:/bin/bash"
+    -e "GROUPADD=jumpbox:1000"
     -p 1022:22 \
     pommib/jumpbox:latest
 ```
@@ -53,18 +53,3 @@ services:
       USERADD: jumpbox:1000:1000:/bin/bash
       GROUPADD: jumpbox:1000
 ```
-
-## Login as root
-
-```
-$ ssh -l root 127.0.0.1 -p 1022
-```
-
-## Login as jumpbox
-
-To login as user jumpbox, make sure `/home/jumpbox` is a mounted volume
-containing `.ssh/authorized_keys` containing your public key.
-
-```
-$ ssh -l jumpbox 127.0.0.1 -p 1022
-```
diff --git a/rebuild.sh b/rebuild.sh
index 748bfe6..d2f5dea 100755
--- a/rebuild.sh
+++ b/rebuild.sh
@@ -1,10 +1,8 @@
 #!/bin/sh
 
-set -x
-
 updates_available () {
     docker pull "$1"
-    if test "$(docker run --rm "$1" /bin/sh -c 'apt -qqq update && apt -qq list --upgradable')" != ""; then
+    if test "$(docker run -it --rm "$1" /bin/sh -c 'apt -qqq update && apt -qq list --upgradable')" != ""; then
         return 0
     else
         return 1
diff --git a/setup.sh b/setup.sh
index f909624..8076088 100755
--- a/setup.sh
+++ b/setup.sh
@@ -46,7 +46,6 @@ while [ "$USERADD" != "$i" ] ;do
     USER_SHELL=$j
 
     useradd --home-dir "$BASE_DIR/$USER_NAME" --shell "$USER_SHELL" --uid "$USER_UID" --gid "$USER_GID" "$USER_NAME"
-    echo "$USER_NAME ALL=(ALL) NOPASSWD:ALL" > "/etc/sudoers.d/$USER_NAME"
 done
 
 # HOSTKEYS="/var/lib/jumpbox/ssh_host_ed25519_key;/var/lib/jumpbox/ssh_host_rsa_key"