diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0e654135008bf1a373b37fc1408eb4589b66944c..56635ba4760e7c6f5487fec85fc6281c528679aa 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -35,6 +35,8 @@ create_pdf:
   image:
     name: pandoc/latex:2.19
     entrypoint: [""]
+  before_script:
+    - tlmgr install koma-script
   script:
     - pandoc technical-reference.md -o technical-reference.pdf --template=rdd.latex  --shift-heading-level-by=-1
   artifacts:
@@ -47,6 +49,8 @@ create_epub:
   image:
     name: pandoc/latex:2.19
     entrypoint: [""]
+  before_script:
+    - tlmgr install koma-script
   script:
     - pandoc technical-reference.md -o technical-reference.epub  --shift-heading-level-by=-1
   artifacts: