diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9a94e417ff5852f5515ba7e7c8a0ec1527699c74..a7f0721851686686ec8819606c4d14297ff61bc4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,8 +37,8 @@ build_and_deploy_docs:
         - tests
     before_script:
         - pip install awscli
-	- apt update
-	- apt install -y graphviz libgl1-mesa-glx xvfb xdg-utils
+        - apt update
+        - apt install -y graphviz libgl1-mesa-glx xvfb xdg-utils
     script:
         - pip install -r requirements_dev.txt
         - python setup.py install