diff --git a/scripts/upgrade b/scripts/upgrade
index ebb38b7..95446e0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -62,7 +62,8 @@ ynh_script_progression --message="Installing Python dependencies..." --weight=3
 pushd $install_dir
 	python3 -m venv $install_dir/venv
 	source $install_dir/venv/bin/activate
-	ynh_exec_warn_less pip install fittrackee==$fittrackee_version
+	ynh_exec_warn_less pip install fittrackee==$fittrackee_version toml pyyaml
+popd
 popd
 
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