diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a1dea3ece17c56b236df0f0437fcdf5c9ee49957..c954bfc9561bb90a41cfde87cd6b795a006a2a73 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -47,7 +47,7 @@ stages:
       - source /storage/app/miniconda3/bin/activate /storage/app/EWS_prod/envs/conda/py3EWS/
       - pip install coverage
       - pip install sphinx
-      - pip install sphinx-build
+      - pip install nbsphinx
       - python3 -V  # Print out python version for debugging
       - mkdir $PACKAGES_DIR
       - mkdir -p $OUTPUT_DIR