diff --git a/Dockerfile b/Dockerfile
index ea7aab9..5478c95 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ COPY requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt --no-cache-dir option 
 
 # copy all files
-COPY main.py api.py notion.py events.py ./
+COPY main.py api.py notion.py events.py helper.py ./
 
 # run code
 CMD ["python3", "main.py"]
\ No newline at end of file