diff --git a/.circleci/config.yml b/.circleci/config.yml
index 17be8c2..b58bd10 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -174,7 +174,7 @@ jobs:
           name: Build application Docker image
           command: |
             docker build -t offen/server:$DOCKER_IMAGE_TAG -f build/server/Dockerfile .
-	          docker build --build-arg siteurl=$SITEURL -t offen/proxy:$DOCKER_IMAGE_TAG -f build/proxy/Dockerfile .
+            docker build --build-arg siteurl=$SITEURL -t offen/proxy:$DOCKER_IMAGE_TAG -f build/proxy/Dockerfile .
       - run:
           name: Save Docker image layer cache
           command: |