diff --git a/Dockerfile b/Dockerfile
index 4770460defd402db1aec8721f687c71232af7a52..97e072d2bf1244f7d6087bf8cdd5dd4013e51cc7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.8
 WORKDIR /
 
 COPY requirements.txt ./
-RUN pip install --upgrade
+RUN pip install --upgrade pip
 RUN pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 COPY . .