diff --git a/install.sh b/install.sh
index 370cb5f..e03a351 100644
--- a/install.sh
+++ b/install.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Non-interactive installer for Ubuntu hosts.
-# - Installs docker and docker compose plugin if missing
+# - Assumes docker and docker compose plugin are already installed
 # - Installs repo under /opt/ploughshares (uses current repo copy)
 # - Ensures .env exists (creates from .env.example if missing)
 # - Installs systemd unit and timer for stack management and daily restart
@@ -18,21 +18,7 @@ SRC_DIR="$(cd "$(dirname "$0")" && pwd)"
 DEST_DIR="/opt/ploughshares"
 SYSTEMD_DIR="/etc/systemd/system"
 
-echo "=== Installing prerequisites (docker, compose) ==="
-if ! command -v docker >/dev/null 2>&1; then
-  apt-get update
-  apt-get install -y ca-certificates curl gnupg
-  install -m 0755 -d /etc/apt/keyrings
-  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
-  chmod a+r /etc/apt/keyrings/docker.gpg
-  echo \
-    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
-    $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
-    tee /etc/apt/sources.list.d/docker.list > /dev/null
-  apt-get update
-  apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
-  systemctl enable --now docker
-fi
+echo "=== Using existing Docker and compose installation ==="
 
 echo "=== Deploying repo to $DEST_DIR ==="
 mkdir -p "$DEST_DIR"