diff --git a/ps_fuzz/attacks/rag_poisoning.py b/ps_fuzz/attacks/rag_poisoning.py
index 2e64360..dc6747e 100644
--- a/ps_fuzz/attacks/rag_poisoning.py
+++ b/ps_fuzz/attacks/rag_poisoning.py
@@ -52,7 +52,7 @@ def _suppress_loggers(logger_names):
     MISSING_PACKAGES.append("langchain-community (embeddings)")
 
 try:
-    from langchain.schema import Document
+    from langchain_core.documents import Document
 except ImportError:
     DEPENDENCIES_AVAILABLE = False
     MISSING_PACKAGES.append("langchain (schema)")
diff --git a/ps_fuzz/chat_clients.py b/ps_fuzz/chat_clients.py
index 4473963..aa08e22 100644
--- a/ps_fuzz/chat_clients.py
+++ b/ps_fuzz/chat_clients.py
@@ -1,7 +1,7 @@
 from .langchain_integration import get_langchain_chat_models_info
 from langchain_core.language_models.chat_models import BaseChatModel
 from langchain_core.outputs.llm_result import LLMResult
-from langchain.schema import BaseMessage, HumanMessage, SystemMessage, AIMessage
+from langchain_core.messages import BaseMessage, HumanMessage, SystemMessage, AIMessage
 from typing import List, Dict, Any, Optional
 from abc import ABC, abstractmethod
 import sys
diff --git a/ps_fuzz/langchain_integration.py b/ps_fuzz/langchain_integration.py
index 8291a00..85b3ee1 100644
--- a/ps_fuzz/langchain_integration.py
+++ b/ps_fuzz/langchain_integration.py
@@ -1,5 +1,5 @@
 from langchain_core.language_models.chat_models import BaseChatModel
-import langchain.chat_models
+import langchain_community.chat_models as chat_models_module
 from typing import Any, Dict, get_origin, Optional
 import inspect, re
 
@@ -85,16 +85,20 @@ def get_langchain_chat_models_info() -> Dict[str, Dict[str, Any]]:
     Introspects a langchain library, extracting information about supported chat models and required/optional parameters
     """
     models: Dict[str, ChatModelInfo] = {}
-    for model_cls_name in langchain.chat_models.__all__:
+    for model_cls_name in chat_models_module.__all__:
         if model_cls_name in EXCLUDED_CHAT_MODELS: continue
-        model_cls = langchain.chat_models.__dict__.get(model_cls_name)
+        model_cls = chat_models_module.__dict__.get(model_cls_name)
         if model_cls and issubclass(model_cls, BaseChatModel):
             model_short_name = camel_to_snake(model_cls.__name__).replace('_chat', '').replace('chat_', '')
             # Introspect supported model parameters
+            # Support both Pydantic v1 (__fields__) and v2 (model_fields)
             params: Dict[str, ChatModelParams] = {}
-            for param_name, field in model_cls.__fields__.items():
+            fields = getattr(model_cls, 'model_fields', None) or getattr(model_cls, '__fields__', {})
+            for param_name, field in fields.items():
                 if param_name in CHAT_MODEL_EXCLUDED_PARAMS: continue
-                typ = field.outer_type_
+                # Pydantic v2 uses field.annotation, v1 uses field.outer_type_
+                typ = getattr(field, 'annotation', None) or getattr(field, 'outer_type_', None)
+                if typ is None: continue
                 if typ not in [str, float, int, bool] and get_origin(typ) not in [str, float, int, bool]: continue
                 doc_lines = _get_class_member_doc(model_cls, param_name)
                 description = ''.join(doc_lines) if doc_lines else None
diff --git a/pyproject.toml b/pyproject.toml
index 6f76b2b..ca69828 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,12 +26,12 @@ dependencies = [
     "setuptools>=61.0",
     "httpx>=0.24.0,<0.25.0",
     "openai==1.6.1",
-    "langchain==0.0.353",
-    "langchain-community==0.0.7",
-    "langchain-core==0.1.4",
+    "langchain>=0.3.0,<0.4.0",
+    "langchain-community>=0.3.0,<0.4.0",
+    "langchain-core>=0.3.81,<0.4.0",
     "argparse==1.4.0",
     "python-dotenv==1.0.0",
-    "tqdm==4.66.1",
+    "tqdm>=4.66.3",
     "colorama==0.4.6",
     "prettytable==3.10.0",
     "pandas==2.2.2",
diff --git a/setup.py b/setup.py
index 854b0ea..2baf766 100755
--- a/setup.py
+++ b/setup.py
@@ -23,22 +23,20 @@
         "Topic :: Software Development :: Quality Assurance",
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11"
     ],
-    python_requires='>=3.7',
+    python_requires='>=3.9',
     install_requires=[
         "httpx>=0.24.0,<0.25.0",
         "openai==1.6.1",
-        "langchain==0.0.353",
-        "langchain-community==0.0.7",
-        "langchain-core==0.1.4",
+        "langchain>=0.3.0,<0.4.0",
+        "langchain-community>=0.3.0,<0.4.0",
+        "langchain-core>=0.3.81,<0.4.0",
         "argparse==1.4.0",
         "python-dotenv==1.0.0",
-        "tqdm==4.66.1",
+        "tqdm>=4.66.3",
         "colorama==0.4.6",
         "prettytable==3.10.0",
         "pandas==2.2.2",
diff --git a/tests/test_chat_clients.py b/tests/test_chat_clients.py
index 475f029..81c9a0e 100644
--- a/tests/test_chat_clients.py
+++ b/tests/test_chat_clients.py
@@ -8,7 +8,7 @@
 from typing import Dict, List
 from langchain_core.language_models.chat_models import BaseChatModel
 from langchain_core.outputs import LLMResult, ChatResult, ChatGeneration
-from langchain_core.pydantic_v1 import Field
+from pydantic import Field
 
 # Fake LangChain model
 class FakeChatModel(BaseChatModel):