diff --git a/dockerfile b/dockerfile
index eec5a24..00032a7 100644
--- a/dockerfile
+++ b/dockerfile
@@ -42,7 +42,7 @@ ENV PATH="${PATH}:/root/.local/bin" \
 COPY --chown=root:root pyproject.toml main.py /app/
 
 # install dependencies
-RUN python -m pip install -i https://pypi.tuna.tsinghua.edu.cn/simple
+RUN python -m pip install /app/ -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 # execute program
 CMD python /app/main.py