diff --git a/depends.txt b/depends.txt
index bac77e7..5088efb 100644
--- a/depends.txt
+++ b/depends.txt
@@ -8,3 +8,4 @@ basic_materials?
 cucina_vegana?
 moretrees?
 vines?
+hopper?
diff --git a/mod.conf b/mod.conf
index 6949a3d..6220cfa 100644
--- a/mod.conf
+++ b/mod.conf
@@ -3,6 +3,6 @@ author = Lokrates
 description = A Minetest-Mod to produce biofuel from unused plants.
 min_minetest_version = 5.0
 depends = default
-optional_depends = pipeworks,farming,pooper,wine,basic_materials,cucina_vegana,moretrees,vines
+optional_depends = pipeworks,farming,pooper,wine,basic_materials,cucina_vegana,moretrees,vines,hopper
 version = 0.6
 title = Biofuel