diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 93f623c8604b35a1ee57d5d0febe396c9f194205..34e35f7633b52063f6c11b770f190668e8ef77c5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -258,6 +258,7 @@ pages:
 
             set +e
             source ./init_env || return 1
+            lisa_python -m pip install -c ./doc/doc_constraints.txt
             set -e
             audit
 
diff --git a/doc/doc_constraints.txt b/doc/doc_constraints.txt
new file mode 100644
index 0000000000000000000000000000000000000000..58a27d88b9a472a4ea15bbecbe8830a05f76643d
--- /dev/null
+++ b/doc/doc_constraints.txt
@@ -0,0 +1,3 @@
+# Workaround for that issue:
+# https://github.com/sphinx-doc/sphinx/issues/13533
+snowballstemmer < 3
diff --git a/tools/tests.sh b/tools/tests.sh
index 20908e07abf6b705dfed4922adba42deea724a11..31ddf6f1a447acce1017706c4b968f1c535f4a1b 100755
--- a/tools/tests.sh
+++ b/tools/tests.sh
@@ -36,6 +36,7 @@ echo "Starting exekall self tests"
 exekall run "$LISA_HOME/tools/exekall/src/exekall/_tests"
 
 echo "Starting documentation pedantic build ..."
+"$LISA_PYTHON" -m pip install -c "$LISA_HOME/doc/doc_constraints.txt"
 lisa-doc-build
 
 MANPAGE_PYTHON_VERSION="3.11"