diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f020b4113be16da723bd74282a981f7379adcf29..f498cbc681a89874f4790f3f342cdaf038925960 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -81,6 +81,7 @@ deploy:book:
   stage: deploy
   only:
     - main
+    - merge_request
   script:
     - cd book
     - mdbook build
@@ -90,6 +91,7 @@ deploy:slides:
   stage: deploy
   only:
     - main
+    - merge_request
   script:
     - cd slides
     - ./build_slides.sh