update
diff --git a/Dockerfile b/Dockerfile
index 6b37aab..13f5989 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,13 +6,13 @@
 echo "apt-get"
 RUN apt-get -y install nodejs
 
+COPY requirements.txt /requirements.txt
+RUN pip install -r /requirements.txt --no-cache-dir
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 COPY . /usr/src/app
 
-RUN pip install -r requirements.txt
-
 RUN npm install -g gulp
 RUN npm install