diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7171f40c1ed4ebc19953bac407ceed44262e2035..8dfa2383f06971fd40c60b94d6c4d9e2787d0f07 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -49,7 +49,7 @@ job_gcc_py2_amd64:
     - CCACHE_BASEDIR=$PWD make $MAKEOPTS
     - make install
     - export PYTHONPATH=$PWD/install/site-packages
-    - cd doc; OMP_NUM_THREADS=1 python2 /usr/bin/sphinx-build -b doctest . build *.rst
+    - cd doc; OMP_NUM_THREADS=1 python2 /usr/bin/sphinx-build2 -b doctest . build *.rst
   tags:
     - amd64
 
@@ -60,7 +60,7 @@ job_clang_py2_amd64:
     - CCACHE_BASEDIR=$PWD make $MAKEOPTS
     - make install
     - export PYTHONPATH=$PWD/install/site-packages
-    - cd doc; OMP_NUM_THREADS=1 python2 /usr/bin/sphinx-build -b doctest . build *.rst
+    - cd doc; OMP_NUM_THREADS=1 python2 /usr/bin/sphinx-build2 -b doctest . build *.rst
   tags:
     - amd64