diff --git a/scripts/upgrade b/scripts/upgrade
index 0098afd..638de41 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -63,7 +63,7 @@ ynh_secure_remove $install_dir/.venv
 pushd $install_dir
 	python3 -m venv $install_dir/venv
 	source $install_dir/venv/bin/activate
-	ynh_exec_warn_less pip install fittrackee==$fittrackee_version toml pyyaml
+	ynh_exec_warn_less pip install pillow=="9.5.0" fittrackee==$fittrackee_version toml pyyaml
 popd