diff --git a/backend/app/services/ssh_connect.py b/backend/app/services/ssh_connect.py
index 6542ab9..6e4aa60 100644
--- a/backend/app/services/ssh_connect.py
+++ b/backend/app/services/ssh_connect.py
@@ -433,7 +433,7 @@ def _ssh_monitor_update_invoke_command(
     safe_repo = _shell_single_quote(repo_url.strip())
     safe_branch = _shell_single_quote((git_branch or "main").strip() or "main")
     preflight = _ssh_monitor_preflight_git_remote(repo_url)
-    return f"{preflight}; REPO_URL={safe_repo} GIT_BRANCH={safe_branch} {SSH_MONITOR_UPDATE_SCRIPT}"
+    return f"{preflight}; UPDATE_VIA_SAC=1 REPO_URL={safe_repo} GIT_BRANCH={safe_branch} {SSH_MONITOR_UPDATE_SCRIPT}"
 
 
 def _ssh_monitor_bootstrap_command(repo_url: str, *, git_branch: str = "main") -> str:
@@ -449,7 +449,7 @@ def _ssh_monitor_bootstrap_command(repo_url: str, *, git_branch: str = "main") -
         f'mkdir -p "$UPDATE_DIR" && cd "$UPDATE_DIR" && '
         f'([ -d "$SCRIPT_NAME" ] || git clone -b "$GIT_BRANCH" "$REPO_URL" "$SCRIPT_NAME") && '
         f'cp "$UPDATE_DIR/$SCRIPT_NAME/update_ssh_monitor.sh" "$INSTALL" && '
-        f'chmod 750 "$INSTALL" && REPO_URL="$REPO_URL" GIT_BRANCH="$GIT_BRANCH" "$INSTALL"'
+        f'chmod 750 "$INSTALL" && UPDATE_VIA_SAC=1 REPO_URL="$REPO_URL" GIT_BRANCH="$GIT_BRANCH" "$INSTALL" --deploy'
     )