diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4f831a2..31cea95 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ image: node:lts
 # Functions that should be executed before the build script is run
 before_script:
   - yarn set version berry
-  - yarn install
+  - yarn install --immutable
 pages:
   script:
     - yarn build