diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1492633..7052c49 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ image: python:3.7.3-slim-stretch
 pages:
   script:
   - apt update
-  - apt install python3-pip python3-dev build-essentials
+  - apt install python3-pip python3-dev build-essential
   - pip3 install --upgrade pip
   - pip3 install -r dev_requirements.txt
   - cd docs