diff --git a/services/docker-compose.yml b/services/docker-compose.yml
index 07191e5..18bf4e8 100644
--- a/services/docker-compose.yml
+++ b/services/docker-compose.yml
@@ -82,7 +82,8 @@ services:
 
   task-watcher:
     build:
-      context: ./task-watcher
+      context: .
+      dockerfile: task-watcher/Dockerfile
     container_name: task-watcher
     restart: unless-stopped
     ports:
diff --git a/services/task-watcher/Dockerfile b/services/task-watcher/Dockerfile
index 959ca84..09c9851 100644
--- a/services/task-watcher/Dockerfile
+++ b/services/task-watcher/Dockerfile
@@ -7,10 +7,13 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates tzdata \
  && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+COPY task-watcher/requirements.txt /app/
 RUN pip install --no-cache-dir --timeout 600 --retries 5 -r requirements.txt
 
-COPY . .
+# 공통 heartbeat 모듈 (services/_shared) — watcher.py가 from _shared.heartbeat import
+COPY _shared /app/_shared
+COPY task-watcher/. /app/
+ENV PYTHONPATH=/app
 
 EXPOSE 8000
 CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]