diff --git a/pyproject.toml b/pyproject.toml
index e610bb5b9342f64070c5fba16159ba96234f3ace..65c8c89e90a2a9872a351725aaf01a5829f7ba0b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,6 +57,7 @@
         "auto-intersphinx",
         "sphinxcontrib-programoutput",
         "matplotlib",
+        "bob.pad.face"
         ]
     test = [
         "pytest",