diff --git a/Dockerfile b/Dockerfile
index d4ec796..a9c6b14 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 FROM python:3.7-alpine
 MAINTAINER f1yegor
 
-ADD docker-requirements.txt /app/requirements.txt
-ADD grafcli.conf.example /etc/grafcli/grafcli.conf
+COPY docker-requirements.txt /app/requirements.txt
+COPY grafcli.conf.example /etc/grafcli/grafcli.conf
 
-RUN pip3 install --upgrade pip
-RUN pip3 install -r /app/requirements.txt
-RUN pip3 install grafcli
+RUN pip3 install --upgrade pip \
+  && pip3 install -r /app/requirements.txt \
+  && RUN pip3 install grafcli
 
 VOLUME ["/etc/grafcli/"]
 VOLUME ["/db"]
diff --git a/tests/integration/Dockerfile b/tests/integration/Dockerfile
index 246ddf0..39b2ed7 100644
--- a/tests/integration/Dockerfile
+++ b/tests/integration/Dockerfile
@@ -1,16 +1,15 @@
 FROM python:3.7-alpine
 
-ADD tests/integration/entrypoint.sh /entrypoint.sh
-ADD tests/integration/wait-for-it.sh /wait-for-it.sh
+COPY tests/integration/entrypoint.sh /entrypoint.sh
+COPY tests/integration/wait-for-it.sh /wait-for-it.sh
 
-RUN sed -i s/6/cdn/ /etc/apk/repositories && apk add --update --progress make bats
-ADD requirements.txt /app/requirements.txt 
-RUN pip3 install --upgrade pip
-RUN pip3 install -r /app/requirements.txt
-
-RUN mkdir -p /etc/grafcli
-RUN ln -s /app/grafcli.conf.example /etc/grafcli/grafcli.conf
-RUN ln -s /app/scripts/grafcli /usr/local/bin/grafcli
+RUN apk add --update --progress make bats
+COPY requirements.txt /app/requirements.txt
+RUN pip3 install --upgrade pip \
+  && pip3 install -r /app/requirements.txt \
+  && mkdir -p /etc/grafcli \
+  && ln -s /app/grafcli.conf.example /etc/grafcli/grafcli.conf \
+  && ln -s /app/scripts/grafcli /usr/local/bin/grafcli
 
 ENV PYTHONPATH=/app