diff --git a/.env.example b/.env.example
index a7f2870..52a6b91 100644
--- a/.env.example
+++ b/.env.example
@@ -20,7 +20,8 @@ JWT_REFRESH_EXPIRES_IN=7d
 POSTGRES_USER=sso
 POSTGRES_PASSWORD=sso_secret
 POSTGRES_DB=sso_db
-DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@localhost:5432/${POSTGRES_DB}
+POSTGRES_PORT=5432
+DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@localhost:${POSTGRES_PORT}/${POSTGRES_DB}
 
 # ──────────────────────────────────────────────
 # Redis
@@ -35,6 +36,7 @@ RABBITMQ_USER=sso
 RABBITMQ_PASSWORD=sso_secret
 RABBITMQ_HOST=localhost
 RABBITMQ_PORT=5672
+RABBITMQ_UI_PORT=15672
 RABBITMQ_URL=amqp://${RABBITMQ_USER}:${RABBITMQ_PASSWORD}@${RABBITMQ_HOST}:${RABBITMQ_PORT}
 
 # ──────────────────────────────────────────────
diff --git a/docker-compose.yml b/docker-compose.yml
index 60fb00e..f71d731 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,7 +8,7 @@ services:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
       POSTGRES_DB: ${POSTGRES_DB}
     ports:
-      - "5432:5432"
+      - "${POSTGRES_PORT:-5432}:5432"
     volumes:
       - pgdata:/var/lib/postgresql/data
     healthcheck:
@@ -21,7 +21,7 @@ services:
     image: redis:7-alpine
     restart: unless-stopped
     ports:
-      - "6379:6379"
+      - "${REDIS_PORT:-6379}:6379"
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 5s
@@ -36,8 +36,8 @@ services:
       RABBITMQ_DEFAULT_USER: ${RABBITMQ_USER}
       RABBITMQ_DEFAULT_PASS: ${RABBITMQ_PASSWORD}
     ports:
-      - "5672:5672"
-      - "15672:15672"
+      - "${RABBITMQ_PORT:-5672}:5672"
+      - "${RABBITMQ_UI_PORT:-15672}:15672"
     healthcheck:
       test: ["CMD", "rabbitmq-diagnostics", "check_port_connectivity"]
       interval: 10s
diff --git a/install.sh b/install.sh
index a93adfb..de41aae 100644
--- a/install.sh
+++ b/install.sh
@@ -18,6 +18,31 @@ step()  { echo -e "\n${CYAN}━━━ $1 ━━━${NC}"; }
 mark_done() { echo "$1" >> "$PROGRESS_FILE"; }
 is_done()   { grep -qx "$1" "$PROGRESS_FILE" 2>/dev/null; }
 
+# ─── Find free port (check + increment until free) ──────────────
+find_free_port() {
+  local port=$1 max=$2
+  max="${max:-65535}"
+  while [ "$port" -le "$max" ]; do
+    if ! ss -tlnp "sport = :$port" 2>/dev/null | grep -q .; then
+      echo "$port"
+      return 0
+    fi
+    port=$((port + 1))
+  done
+  echo "$1"
+  return 1
+}
+
+# ─── Update or add a variable in .env ────────────────────────────
+set_env() {
+  local key=$1 val=$2 file="${INSTALL_DIR}/.env"
+  if grep -q "^${key}=" "$file" 2>/dev/null; then
+    sed -i "s|^${key}=.*|${key}=${val}|" "$file"
+  else
+    echo "${key}=${val}" >> "$file"
+  fi
+}
+
 echo -e "${CYAN}"
 echo "  ╔══════════════════════════════════════════════╗"
 echo "  ║           SSO Service — Auto Installer       ║"
@@ -180,13 +205,40 @@ set -a; source .env; set +a
 # ─── 5. Docker infrastructure ────────────────────────────────────
 step "5/8  Starting infrastructure (PostgreSQL, Redis, RabbitMQ)"
 
-# Проверка занятости портов
-for port in 5432 6379 5672 15672; do
-  if ss -tlnp "sport = :$port" 2>/dev/null | grep -q .; then
-    warn "Port $port is already in use — service may conflict with existing postgres/redis/rabbitmq"
+# Проверка и переназначение занятых портов
+PORT_MAP=""
+for pair in "POSTGRES_PORT:5432" "REDIS_PORT:6379" "RABBITMQ_PORT:5672" "RABBITMQ_UI_PORT:15672"; do
+  var="${pair%%:*}"
+  default="${pair#*:}"
+  current=$(grep "^${var}=" "$INSTALL_DIR/.env" 2>/dev/null | cut -d= -f2) || true
+  current="${current:-$default}"
+
+  if ss -tlnp "sport = :$current" 2>/dev/null | grep -q .; then
+    warn "Port $current ($var) is busy — finding free port..."
+    new_port=$(find_free_port "$((current + 1))" 2>/dev/null) || new_port=$((current + 100))
+    set_env "$var" "$new_port"
+    info "  $var changed: $current → $new_port"
+    PORT_MAP="$PORT_MAP $var=$new_port"
+  else
+    info "  $var → $current"
   fi
 done
 
+# Если порты изменились — перечитать .env
+if [ -n "$PORT_MAP" ]; then
+  set -a; source "$INSTALL_DIR/.env"; set +a
+  info "Ports adjusted — re-sourced .env"
+fi
+
+# Обновить DATABASE_URL если POSTGRES_PORT изменился
+POSTGRES_PORT_CUR=$(grep "^POSTGRES_PORT=" "$INSTALL_DIR/.env" 2>/dev/null | cut -d= -f2)
+PG_USER=$(grep "^POSTGRES_USER=" "$INSTALL_DIR/.env" 2>/dev/null | cut -d= -f2)
+PG_PASS=$(grep "^POSTGRES_PASSWORD=" "$INSTALL_DIR/.env" 2>/dev/null | cut -d= -f2)
+PG_DB=$(grep "^POSTGRES_DB=" "$INSTALL_DIR/.env" 2>/dev/null | cut -d= -f2)
+NEW_URL="postgresql://${PG_USER}:${PG_PASS}@localhost:${POSTGRES_PORT_CUR}/${PG_DB}"
+set_env "DATABASE_URL" "$NEW_URL"
+export DATABASE_URL="$NEW_URL"
+
 # Остановить предыдущие контейнеры (если есть), потом запустить заново
 $SUDO docker compose down --remove-orphans 2>/dev/null || true