diff --git a/Dockerfile b/Dockerfile
index e948fd4..00f02fc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,8 +13,9 @@ WORKDIR /app
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+COPY requirements.prod.txt .
+RUN pip install --no-cache-dir --index-url https://download.pytorch.org/whl/cpu torch==2.10.0
+RUN pip install --no-cache-dir -r requirements.prod.txt
 
 COPY game ./game
 COPY rl ./rl
diff --git a/README.md b/README.md
index a247234..b415b2e 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,9 @@ make setup
 pip install -r requirements.txt
 ```
 
+For deployment builds, the Dockerfile installs `requirements.prod.txt`, which
+includes runtime dependencies (FastAPI + RL model) but omits local dev/test tools.
+
 ## Run the dev servers
 
 Backend API (FastAPI + reload):
diff --git a/requirements.prod.txt b/requirements.prod.txt
new file mode 100644
index 0000000..45f905b
--- /dev/null
+++ b/requirements.prod.txt
@@ -0,0 +1,6 @@
+fastapi==0.128.0
+gymnasium==1.2.3
+numpy==2.4.1
+sb3-contrib==2.7.1
+stable-baselines3==2.7.1
+uvicorn[standard]==0.40.0
diff --git a/server/session_store.py b/server/session_store.py
index 9beac93..8d33d0b 100644
--- a/server/session_store.py
+++ b/server/session_store.py
@@ -11,6 +11,7 @@
 from game.game import Game
 from game.game_state import GameState
 
+
 class AIPlayerProtocol(Protocol):
     async def get_action(self, game_state: GameState, legal_actions: list) -> object: ...
     def get_action_sync(self, game_state: GameState, legal_actions: list) -> object: ...