diff --git a/.circleci/Dockerfile.centos-7 b/.circleci/Dockerfile.centos
similarity index 96%
rename from .circleci/Dockerfile.centos-7
rename to .circleci/Dockerfile.centos
index 8865fd008..616bc2148 100644
--- a/.circleci/Dockerfile.centos-7
+++ b/.circleci/Dockerfile.centos
@@ -1,4 +1,5 @@
-FROM centos:7
+ARG TAG
+FROM centos:${TAG}
 
 ENV WHEELHOUSE_PATH /tmp/wheelhouse
 ENV VIRTUALENV_PATH /tmp/venv
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 89f82bd43..37a5a32b4 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -390,7 +390,7 @@ jobs:
       - run:
           name: "Build CentOS images"
           command: |
-            docker build -t tahoelafsci/centos:7 -f ~/project/.circleci/Dockerfile.centos-7 ~/project/
+            docker build --build-arg TAG=7 -t tahoelafsci/centos:7 -f ~/project/.circleci/Dockerfile.centos ~/project/
       - run:
           name: "Push CentOS images"
           command: |