diff --git a/init.lua b/init.lua
index 4cc9aec..a6f709e 100644
--- a/init.lua
+++ b/init.lua
@@ -45,4 +45,6 @@ minetest.register_node("periodic_elements:oxygen_block", {
     description = "Oxygen block",
     tiles = {"oxygen.png"},
     groups = {cracky = 3, stone = 1},
-})
\ No newline at end of file
+})
+
+-- Water recipe
\ No newline at end of file
diff --git a/mod.conf b/mod.conf
index 60e7968..e3932f2 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,4 +1,5 @@
 name = periodic_elements
 description = Adds the periodic elements to minetests
 author = Victor Andrade Resende
-version = 1.0.1
\ No newline at end of file
+version = 1.0.1
+optional_depends = default