diff --git a/02-migrate-peers.sh b/02-migrate-peers.sh
index 37acec2..db3b16b 100644
--- a/02-migrate-peers.sh
+++ b/02-migrate-peers.sh
@@ -64,6 +64,8 @@ echo "[START-02] $(date '+%Y-%m-%d %H:%M:%S')" >> "$LOG"
 sep
 info "Checking prerequisites..."
 
+docker info &>/dev/null || fail "No Docker access. Run: sudo usermod -aG docker $USER && newgrp docker"
+
 [ -f "$BACKUP_DIR/private_key" ]        || fail "No private key backup found."
 [ -f "$BACKUP_DIR/wg0-legacy.conf" ]    || fail "No peer backup found."
 [ -f "$BACKUP_DIR/public_key" ]         || fail "No public key backup found."
@@ -265,4 +267,4 @@ echo "  Existing users reconnect automatically"
 echo "  without new configuration."
 echo ""
 echo "  Log: cat $LOG"
-echo "========================================="
+echo "========================================="
\ No newline at end of file