diff --git a/src/game/graph.py b/src/game/graph.py
index d4f6666..e9d3cd0 100644
--- a/src/game/graph.py
+++ b/src/game/graph.py
@@ -17,6 +17,7 @@
 - Private state management for player mindsets and game setup
 """
 
+import asyncio
 from functools import partial
 from uuid import uuid4
 
@@ -200,7 +201,11 @@ def main():
     langgraph_config = RunnableConfig(
         configurable={"thread_id": initial_state["game_id"]},
     )
-    result = app.invoke(initial_state, config=langgraph_config)
+
+    async def _run_workflow():
+        return await app.ainvoke(initial_state, config=langgraph_config)
+
+    result = asyncio.run(_run_workflow())
     print(result)
 
 
diff --git a/src/game/metrics.py b/src/game/metrics.py
index 6471581..aeaa54a 100644
--- a/src/game/metrics.py
+++ b/src/game/metrics.py
@@ -15,6 +15,7 @@
 
 from __future__ import annotations
 
+import asyncio
 from collections import Counter, defaultdict
 from concurrent.futures import ThreadPoolExecutor
 from dataclasses import dataclass
@@ -736,7 +737,11 @@ def _run_single_multilingual_game(
     }
 
     run_config = RunnableConfig(configurable={"thread_id": game_id})
-    app.invoke(initial_state, config=run_config)
+
+    async def _run_game():
+        await app.ainvoke(initial_state, config=run_config)
+
+    asyncio.run(_run_game())
 
 
 def run_multilingual_metrics_batch(
diff --git a/src/game/nodes/player.py b/src/game/nodes/player.py
index a9d66c9..3874b23 100644
--- a/src/game/nodes/player.py
+++ b/src/game/nodes/player.py
@@ -95,7 +95,7 @@ def _create_player_private_state_delta(
     }
 
 
-def player_speech(state: GameState, player_id: str) -> Dict[str, Any]:
+async def player_speech(state: GameState, player_id: str) -> Dict[str, Any]:
     """
     Player node for generating speech.
     Calls LLM to infer identity and generate speech.
@@ -120,7 +120,7 @@ def player_speech(state: GameState, player_id: str) -> Dict[str, Any]:
     existing_player_mindset = get_normalized_player_mindset(existing_private_state)
 
     llm_client = _get_llm_client()
-    updated_mindset = llm_update_player_mindset(
+    updated_mindset = await llm_update_player_mindset(
         llm_client=llm_client,
         my_word=my_word,
         completed_speeches=state["completed_speeches"],
@@ -142,7 +142,7 @@ def player_speech(state: GameState, player_id: str) -> Dict[str, Any]:
         speech_plan = None
 
     # Generate speech using LLM
-    new_speech_text = llm_generate_speech(
+    new_speech_text = await llm_generate_speech(
         llm_client=llm_client,
         my_word=my_word,
         self_belief=updated_mindset_state.get("self_belief", {}),
@@ -186,7 +186,7 @@ def player_speech(state: GameState, player_id: str) -> Dict[str, Any]:
     }
 
 
-def player_vote(state: GameState, player_id: str) -> Dict[str, Any]:
+async def player_vote(state: GameState, player_id: str) -> Dict[str, Any]:
     """
     Player node for casting a vote.
     Calls LLM to infer identity and decide vote target.
@@ -211,7 +211,7 @@ def player_vote(state: GameState, player_id: str) -> Dict[str, Any]:
     existing_player_mindset = get_normalized_player_mindset(existing_private_state)
 
     llm_client = _get_llm_client()
-    updated_mindset = llm_update_player_mindset(
+    updated_mindset = await llm_update_player_mindset(
         llm_client=llm_client,
         my_word=my_word,
         completed_speeches=state["completed_speeches"],
@@ -223,7 +223,7 @@ def player_vote(state: GameState, player_id: str) -> Dict[str, Any]:
     )
     updated_mindset_state = normalize_mindset(updated_mindset)
     # Decide on a vote target using the LLM with bound voting tools
-    voted_target = llm_decide_vote(
+    voted_target = await llm_decide_vote(
         llm_client=llm_client,
         state=state,
         me=player_id,
diff --git a/src/game/strategy/strategy_core.py b/src/game/strategy/strategy_core.py
index dd589d1..2dad07d 100644
--- a/src/game/strategy/strategy_core.py
+++ b/src/game/strategy/strategy_core.py
@@ -5,6 +5,8 @@
 for player mindset updates and speech generation.
 """
 
+import asyncio
+import inspect
 from typing import Any, List, Dict, Sequence, cast
 from venv import logger
 
@@ -40,6 +42,20 @@
 from src.game.strategy.utils.text_utils import sanitize_speech_output
 
 
+async def _invoke_async(target: Any, *args: Any, **kwargs: Any) -> Any:
+    """Awaitably invoke LangChain runnables, falling back to sync methods."""
+    ainvoke = getattr(target, "ainvoke", None)
+    if callable(ainvoke):
+        result = ainvoke(*args, **kwargs)
+        return await result if inspect.isawaitable(result) else result
+
+    invoke = getattr(target, "invoke", None)
+    if callable(invoke):
+        return await asyncio.to_thread(invoke, *args, **kwargs)
+
+    raise AttributeError(f"Object {target!r} has neither ainvoke nor invoke.")
+
+
 def _to_mindset_model(
     mindset: PlayerMindset | PlayerMindsetModel | None,
 ) -> PlayerMindsetModel:
@@ -64,7 +80,7 @@ def _mindset_model_to_state(model: PlayerMindsetModel) -> PlayerMindset:
     return cast(PlayerMindset, model.model_dump())
 
 
-def llm_update_player_mindset(
+async def llm_update_player_mindset(
     llm_client: Any,
     my_word: str,
     completed_speeches: Sequence[Speech],
@@ -127,7 +143,7 @@ def llm_update_player_mindset(
             SystemMessage(content=system_prompt),
             HumanMessage(content=user_context),
         ]
-        result = agent.invoke({"messages": messages})
+        result = await _invoke_async(agent, {"messages": messages})
 
         # Extract structured response from agent result
         structured = result.get("structured_response")
@@ -154,7 +170,7 @@ def llm_update_player_mindset(
     return existing_state
 
 
-def llm_generate_speech(
+async def llm_generate_speech(
     llm_client: Any,
     my_word: str,
     self_belief: SelfBelief,
@@ -197,7 +213,7 @@ def llm_generate_speech(
         HumanMessage(content=user_context),
     ]
 
-    response = llm_client.invoke(messages)
+    response = await _invoke_async(llm_client, messages)
 
     raw_text = response.content if hasattr(response, "content") else response
     return sanitize_speech_output(raw_text)
@@ -223,7 +239,7 @@ def plan_player_speech(
     return planner.func()
 
 
-def llm_decide_vote(
+async def llm_decide_vote(
     llm_client: Any,
     state: GameState,
     me: str,
@@ -274,13 +290,14 @@ def llm_decide_vote(
     )
 
     try:
-        result = agent.invoke(
+        result = await _invoke_async(
+            agent,
             {
                 "messages": [
                     SystemMessage(content=system_prompt),
                     HumanMessage(content=vote_context),
                 ]
-            }
+            },
         )
         structured = result.get("structured_response")
         if structured:
diff --git a/tests/test_llm_strategy.py b/tests/test_llm_strategy.py
index b4bf469..0450139 100644
--- a/tests/test_llm_strategy.py
+++ b/tests/test_llm_strategy.py
@@ -1,5 +1,6 @@
+import asyncio
 from typing import Dict
-from unittest.mock import MagicMock, patch
+from unittest.mock import AsyncMock, MagicMock, patch
 
 from src.game.strategy import llm_update_player_mindset
 from src.game.strategy.builders.prompt_builder import (
@@ -206,39 +207,45 @@ def test_llm_update_player_mindset_success():
     """Tests successful belief inference with structured output."""
     # Mock the agent's invoke method to return structured response
     mock_agent = MagicMock()
-    mock_agent.invoke.return_value = {
-        "structured_response": make_player_mindset(
-            self_belief=make_self_belief("civilian", 0.9),
-            suspicions={"b": make_suspicion("spy", 0.7, "Suspicious speech")},
-        )
-    }
+    mock_agent.ainvoke = AsyncMock(
+        return_value={
+            "structured_response": make_player_mindset(
+                self_belief=make_self_belief("civilian", 0.9),
+                suspicions={"b": make_suspicion("spy", 0.7, "Suspicious speech")},
+            )
+        }
+    )
 
     # Mock create_agent to return our mock agent
     with patch("src.game.strategy.strategy_core.create_agent", return_value=mock_agent):
         mock_llm = MagicMock()
         test_state = mock_state_inference_en.copy()
-        result = llm_update_player_mindset(llm_client=mock_llm, **test_state)
+        result = asyncio.run(
+            llm_update_player_mindset(llm_client=mock_llm, **test_state)
+        )
 
         assert result["self_belief"]["role"] == "civilian"
         assert result["suspicions"]["b"]["reason"] == "Suspicious speech"
-        mock_agent.invoke.assert_called_once()
+        mock_agent.ainvoke.assert_awaited_once()
 
 
 def test_llm_update_player_mindset_failure():
     """Tests fallback behavior when structured output extraction fails for inference."""
     # Mock the agent's invoke method to return None (simulating failure)
     mock_agent = MagicMock()
-    mock_agent.invoke.return_value = {"structured_response": None}
+    mock_agent.ainvoke = AsyncMock(return_value={"structured_response": None})
 
     # Mock create_agent to return our mock agent
     with patch("src.game.strategy.strategy_core.create_agent", return_value=mock_agent):
         mock_llm = MagicMock()
         test_state = mock_state_inference_en.copy()
-        result = llm_update_player_mindset(llm_client=mock_llm, **test_state)
+        result = asyncio.run(
+            llm_update_player_mindset(llm_client=mock_llm, **test_state)
+        )
 
         assert result["self_belief"]["role"] == "civilian"
         assert (
             result["self_belief"]["confidence"]
             == mock_player_mindset["self_belief"]["confidence"]
         )
-        mock_agent.invoke.assert_called_once()
+        mock_agent.ainvoke.assert_awaited_once()
diff --git a/tests/test_player_nodes.py b/tests/test_player_nodes.py
index b022ca4..307a6d2 100644
--- a/tests/test_player_nodes.py
+++ b/tests/test_player_nodes.py
@@ -1,7 +1,8 @@
+import asyncio
 from typing import Dict
 
 import pytest
-from unittest.mock import patch, MagicMock
+from unittest.mock import AsyncMock, MagicMock, patch
 from src.game.nodes.player import player_speech, player_vote
 from src.game.state import (
     GameState,
@@ -102,8 +103,8 @@ def base_player_state(player_id):
 
 
 @patch("src.game.nodes.player._get_llm_client")
-@patch("src.game.nodes.player.llm_generate_speech")
-@patch("src.game.nodes.player.llm_update_player_mindset")
+@patch("src.game.nodes.player.llm_generate_speech", new_callable=AsyncMock)
+@patch("src.game.nodes.player.llm_update_player_mindset", new_callable=AsyncMock)
 def test_player_speech(
     mock_infer, mock_speech, mock_get_llm, player_id, base_player_state: GameState
 ):
@@ -119,7 +120,7 @@ def test_player_speech(
     mock_speech.return_value = "This is a test speech."
 
     # Act: Call the player_speech node
-    update = player_speech(base_player_state, player_id)
+    update = asyncio.run(player_speech(base_player_state, player_id))
 
     # Assert: Verify the output is correct
     assert "completed_speeches" in update
@@ -134,13 +135,13 @@ def test_player_speech(
 
     # Verify mocks were called correctly
     mock_get_llm.assert_called_once()
-    mock_infer.assert_called_once()
-    mock_speech.assert_called_once()
+    mock_infer.assert_awaited_once()
+    mock_speech.assert_awaited_once()
 
 
 @patch("src.game.nodes.player._get_llm_client")
-@patch("src.game.nodes.player.llm_update_player_mindset")
-@patch("src.game.nodes.player.llm_decide_vote")
+@patch("src.game.nodes.player.llm_update_player_mindset", new_callable=AsyncMock)
+@patch("src.game.nodes.player.llm_decide_vote", new_callable=AsyncMock)
 def test_player_vote(
     mock_decide_vote, mock_infer, mock_get_llm, player_id, base_player_state: GameState
 ):
@@ -162,7 +163,7 @@ def test_player_vote(
     }
 
     # Act: Call the player_vote node
-    update = player_vote(voting_state, player_id)
+    update = asyncio.run(player_vote(voting_state, player_id))
 
     # Assert: Verify the output
     assert "current_votes" in update
@@ -176,8 +177,8 @@ def test_player_vote(
 
     # Verify mocks
     mock_get_llm.assert_called_once()
-    mock_infer.assert_called_once()
-    mock_decide_vote.assert_called_once_with(
+    mock_infer.assert_awaited_once()
+    mock_decide_vote.assert_awaited_once_with(
         llm_client=mock_llm_client,
         state=voting_state,
         me=player_id,
@@ -189,21 +190,21 @@ def test_player_vote(
 def test_player_speech_not_in_speaking_phase(base_player_state: GameState):
     """Tests that player_speech returns empty dict if not in speaking phase."""
     state = base_player_state | {"game_phase": "voting"}
-    update = player_speech(state, "a")
+    update = asyncio.run(player_speech(state, "a"))
     assert update == {}
 
 
 def test_player_vote_not_in_voting_phase(base_player_state: GameState):
     """Tests that player_vote returns empty dict if not in voting phase."""
     state = base_player_state | {"game_phase": "speaking"}
-    update = player_vote(state, "a")
+    update = asyncio.run(player_vote(state, "a"))
     assert update == {}
 
 
 def test_player_node_for_eliminated_player(base_player_state: GameState):
     """Tests that nodes do nothing for an eliminated player."""
     state = base_player_state | {"eliminated_players": ["a"]}
-    speech_update = player_speech(state, "a")
-    vote_update = player_vote(state | {"game_phase": "voting"}, "a")
+    speech_update = asyncio.run(player_speech(state, "a"))
+    vote_update = asyncio.run(player_vote(state | {"game_phase": "voting"}, "a"))
     assert speech_update == {}
     assert vote_update == {}