diff --git a/python/pyproject.toml b/python/pyproject.toml
index 78520d47b..830bc9575 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -25,8 +25,8 @@ runtime_common = [
 ]
 srt = [
     "sglang[runtime_common]", "cuda-python",
-    "sgl-kernel>=0.0.3.post2", "torch", "vllm==0.6.4.post1",
-    "flashinfer_python>=0.2.0.post2", "outlines>=0.0.44,<0.1.0"
+    "sgl-kernel>=0.0.3.post2", "torch", "vllm>=0.6.4.post1,<=0.7.2",
+    "flashinfer_python>=0.2.0.post2", "outlines>=0.0.44,<=0.1.11"
 ]
 
 # HIP (Heterogeneous-computing Interface for Portability) for AMD
diff --git a/python/sglang/srt/constrained/outlines_backend.py b/python/sglang/srt/constrained/outlines_backend.py
index 91dbcba24..47dd485cd 100644
--- a/python/sglang/srt/constrained/outlines_backend.py
+++ b/python/sglang/srt/constrained/outlines_backend.py
@@ -35,7 +35,10 @@ is_hip_ = is_hip()
 if is_hip_:
     from outlines_core.fsm.json_schema import build_regex_from_schema
 else:
-    from outlines.fsm.json_schema import build_regex_from_schema
+    try:
+        from outlines.fsm.json_schema import build_regex_from_schema
+    except ImportError:
+        from outlines_core.fsm.json_schema import build_regex_from_schema
 
 
 logger = logging.getLogger(__name__)