diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e44f7997ef238b3c6c8b7355921aa556e39ec0f9..fafd966e3a615028d36a0f6435dd1e83465ac883 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,11 +1,11 @@
 image: ruby
 
 before_script:
-  - gem install bundler:2.3
+  - gem install bundler:2.1.4
   
 pages:
   script:
-    - bundle _2.3_ install
+    - bundle _2.1.4_ install
     - bundle exec jekyll build -d public
   tags:
     - docker