diff --git a/runtimes/python2/Dockerfile b/runtimes/python2/Dockerfile
index 7620169a..7051e980 100644
--- a/runtimes/python2/Dockerfile
+++ b/runtimes/python2/Dockerfile
@@ -7,11 +7,11 @@ RUN useradd -Ms /bin/bash qinling
 
 RUN apt-get update && \
     apt-get -y install python-dev python-setuptools libffi-dev libxslt1-dev libxml2-dev libyaml-dev libssl-dev python-pip && \
-    pip install -U pip setuptools uwsgi
+    pip --no-cache-dir install -U pip setuptools uwsgi
 
 COPY . /app
 WORKDIR /app
-RUN pip install --no-cache-dir -r requirements.txt && \
+RUN pip --no-cache-dir install -r requirements.txt && \
     chmod 0750 custom-entrypoint.sh && \
     mkdir /qinling_cgroup && \
     mkdir -p /var/lock/qinling && \
diff --git a/runtimes/python3/Dockerfile b/runtimes/python3/Dockerfile
index 35670e79..f5bcfb4b 100644
--- a/runtimes/python3/Dockerfile
+++ b/runtimes/python3/Dockerfile
@@ -7,11 +7,11 @@ RUN useradd -Ms /bin/bash qinling
 
 RUN apt-get update && \
     apt-get -y install python3-dev python3-setuptools libffi-dev libxslt1-dev libxml2-dev libyaml-dev libssl-dev python3-pip && \
-    pip3 install -U pip setuptools uwsgi
+    pip3 --no-cache-dir install -U pip setuptools uwsgi
 
 COPY . /app
 WORKDIR /app
-RUN pip install --no-cache-dir -r requirements.txt && \
+RUN pip --no-cache-dir install -r requirements.txt && \
     chmod 0750 custom-entrypoint.sh && \
     mkdir /qinling_cgroup && \
     mkdir -p /var/lock/qinling && \
diff --git a/runtimes/sidecar/Dockerfile b/runtimes/sidecar/Dockerfile
index 8d2b11c1..384f064c 100644
--- a/runtimes/sidecar/Dockerfile
+++ b/runtimes/sidecar/Dockerfile
@@ -7,12 +7,12 @@ RUN adduser -HDs /bin/sh qinling
 
 RUN apk update && \
     apk add --no-cache linux-headers build-base python2 python2-dev py2-pip uwsgi-python uwsgi-http && \
-    pip install --upgrade pip && \
+    pip --no-cache-dir install --upgrade pip && \
     rm -r /root/.cache
 
 COPY . /sidecar
 WORKDIR /sidecar
-RUN pip install --no-cache-dir -r requirements.txt && \
+RUN pip --no-cache-dir install -r requirements.txt && \
     mkdir -p /var/lock/qinling && \
     mkdir -p /var/qinling/packages && \
     chown -R qinling:qinling /sidecar /var/lock/qinling /var/qinling/packages
diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
index ea8e72ec..9ed53f62 100644
--- a/tools/docker/Dockerfile
+++ b/tools/docker/Dockerfile
@@ -23,9 +23,9 @@ RUN apt-get -qq update && \
       libuv1-dev && \
       curl -f -o /tmp/get-pip.py https://bootstrap.pypa.io/3.2/get-pip.py && \
       python /tmp/get-pip.py && rm /tmp/get-pip.py && \
-      pip install --upgrade pip
+      pip --no-cache-dir install --upgrade pip
 
-RUN pip install pymysql psycopg2 py_mini_racer
+RUN pip --no-cache-dir install pymysql psycopg2 py_mini_racer
 
 ENV QINLING_DIR="/opt/stack/qinling" \
     TMP_CONSTRAINTS="/tmp/upper-constraints.txt" \
@@ -44,11 +44,11 @@ COPY requirements.txt "${QINLING_DIR}/"
 RUN curl -o "${TMP_CONSTRAINTS}" \
     http://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt && \
     sed -i "/^qinling.*/d" "${TMP_CONSTRAINTS}" && \
-    pip install -r "${QINLING_DIR}/requirements.txt"
+    pip --no-cache-dir install -r "${QINLING_DIR}/requirements.txt"
 
 COPY . ${QINLING_DIR}
 
-RUN pip install -e "${QINLING_DIR}" && \
+RUN pip --no-cache-dir install -e "${QINLING_DIR}" && \
     mkdir /etc/qinling && \
     rm -rf /var/lib/apt/lists/* && \
     find ${QINLING_DIR} -name "*.sh" -exec chmod +x {} \;