diff --git a/.buildkite/scripts/generate-nightly-index.py b/.buildkite/scripts/generate-nightly-index.py
index 8d09ba178db7..4d28ec9619de 100644
--- a/.buildkite/scripts/generate-nightly-index.py
+++ b/.buildkite/scripts/generate-nightly-index.py
@@ -7,13 +7,14 @@
 
 import argparse
 import json
-import re
 import sys
 from dataclasses import asdict, dataclass
 from pathlib import Path
 from typing import Any
 from urllib.parse import quote
 
+import regex as re
+
 if not sys.version_info >= (3, 12):
     raise RuntimeError("This script requires Python 3.12 or higher.")
 
diff --git a/vllm/entrypoints/serve/instrumentator/metrics.py b/vllm/entrypoints/serve/instrumentator/metrics.py
index efe0c63a9071..5231451383a2 100644
--- a/vllm/entrypoints/serve/instrumentator/metrics.py
+++ b/vllm/entrypoints/serve/instrumentator/metrics.py
@@ -2,9 +2,8 @@
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 
-import re
-
 import prometheus_client
+import regex as re
 from fastapi import FastAPI, Response
 from prometheus_client import make_asgi_app
 from prometheus_fastapi_instrumentator import Instrumentator
diff --git a/vllm/tokenizers/deepseek_v32_encoding.py b/vllm/tokenizers/deepseek_v32_encoding.py
index 72f43395b192..fb8989e651e3 100644
--- a/vllm/tokenizers/deepseek_v32_encoding.py
+++ b/vllm/tokenizers/deepseek_v32_encoding.py
@@ -5,9 +5,10 @@
 # copy from https://huggingface.co/deepseek-ai/DeepSeek-V3.2/blob/main/encoding/encoding_dsv32.py
 import copy
 import json
-import re
 from typing import Any
 
+import regex as re
+
 # flake8: noqa: E501
 TOOLS_SYSTEM_TEMPLATE = """## Tools
 You have access to a set of tools you can use to answer the user's question.