Change version of pip on more newest

Change-Id: I92cd2ccd797783459648e02b69b369728655caef
Related-Prod: PROD-23315
diff --git a/Dockerfile b/Dockerfile
index 980b7c5..08d60db 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,7 +33,7 @@
   && apt-get install -y vim-tiny git-core python-pip libffi-dev libssl-dev python-dev python3-dev iputils-ping patch
 
 #Due to upstream bug we should use fixed version of pip
-RUN pip install -U 'pip==9.0.3'
+RUN pip install -U 'pip==18.0'
 WORKDIR /var/lib/
 # TODO migrate to downstrem mirror?
 RUN git clone https://github.com/openstack/requirements.git openstack_requirements && \