diff --git a/scripts/upgrade b/scripts/upgrade
index 5f7529f..17a76f2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -82,6 +82,8 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=8
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
+dpkg --remove crystal
+
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id=crystal
 ynh_exec_warn_less dpkg -i $tempdir/crystal_1.0.0-1_amd64.deb