diff --git a/README.md b/README.md
index ce8b0e8..3b41d5a 100644
--- a/README.md
+++ b/README.md
@@ -8,5 +8,9 @@ This server mod provides upgradeable packs in form of items to players which giv
 
 License: MIT
 
+Dependencies: default, vessels
+
+Optional dependencies: unified_inventory, sfinv
+
 ## Craft recipes
 1. Download and install a craft guide
diff --git a/init.lua b/init.lua
index 62091dd..45f2811 100644
--- a/init.lua
+++ b/init.lua
@@ -1,3 +1,7 @@
+if not minetest.register_allow_player_inventory_action then
+	error("[upgrade_packs] This mod requires at least Minetest 5.0.0-dev")
+end
+
 upgrade_packs = {}
 upgrade_packs.health_items = {}
 upgrade_packs.breath_items = {}
diff --git a/mod.conf b/mod.conf
index 3a607dc..354e0c6 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,4 +1,4 @@
 name = upgrade_packs
 description = Provides craftable packs to players to increase their health and breath
-depends = default
-optional_depends = unified_inventory, sfinv, vessels
\ No newline at end of file
+depends = default, vessels
+optional_depends = unified_inventory, sfinv
\ No newline at end of file