diff --git a/lang_agent/tool_manager.py b/lang_agent/tool_manager.py
index ce97914..41151f7 100644
--- a/lang_agent/tool_manager.py
+++ b/lang_agent/tool_manager.py
@@ -1,7 +1,8 @@
 from dataclasses import dataclass, field, is_dataclass
-from typing import Type, List
+import functools
+from typing import Type, List, Callable, Any
 import tyro
-import json
+import inspect
 import asyncio
 import os.path as osp
 from loguru import logger
@@ -30,6 +31,33 @@ class ToolManagerConfig(InstantiateConfig):
     calc_config: CalculatorConfig = field(default_factory=CalculatorConfig)
 
 
+def async_to_sync(async_func: Callable) -> Callable:
+    """
+    Decorator that converts an async function to a sync function.
+    
+    Args:
+        async_func: The async function to convert
+        
+    Returns:
+        A synchronous wrapper function
+    """
+    @functools.wraps(async_func)
+    def sync_wrapper(*args: Any, **kwargs: Any) -> Any:
+        try:
+            loop = asyncio.get_event_loop()
+            if loop.is_running():
+                # Handle nested event loops (e.g., in Jupyter)
+                import nest_asyncio
+                nest_asyncio.apply()
+                return loop.run_until_complete(async_func(*args, **kwargs))
+            else:
+                return loop.run_until_complete(async_func(*args, **kwargs))
+        except RuntimeError:
+            # No event loop exists, create a new one
+            return asyncio.run(async_func(*args, **kwargs))
+    
+    return sync_wrapper
+
 class ToolManager:
     def __init__(self, config:ToolManagerConfig):
         self.config = config
@@ -74,4 +102,18 @@ class ToolManager:
     
     
     def get_langchain_tools(self):
-        return [StructuredTool.from_function(func=func) for func in self.get_tool_fncs()]
\ No newline at end of file
+        out = []
+        for func in self.get_tool_fncs():
+            if inspect.iscoroutinefunction(func):
+                out.append(
+                    StructuredTool.from_function(
+                        func=async_to_sync(func),
+                        coroutine=func)
+                )
+            else:
+                out.append(
+                    StructuredTool.from_function(func=func)
+                )
+
+        return out
+        # return [StructuredTool.from_function(func=func) for func in self.get_tool_fncs()]
\ No newline at end of file