diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..ab89da0
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,29 @@
+unused_args = false
+-- allow_defined_top = true
+
+globals = {
+    "minetest",
+    "auroras",
+}
+
+read_globals = {
+    string = {fields = {"split"}},
+    table = {fields = {"copy", "getn"}},
+
+    -- Builtin
+    "vector",
+    "ItemStack",
+    "dump",
+    "DIR_DELIM",
+    "VoxelArea",
+    "Settings",
+    "PerlinNoise",
+
+    -- MTG
+    "default",
+    "sfinv",
+    "creative",
+
+    -- Mods
+    "climate_api",
+}
diff --git a/init.lua b/init.lua
index fa67c91..f4c92ee 100644
--- a/init.lua
+++ b/init.lua
@@ -178,7 +178,7 @@ function auroras.init_colors()
     if auroras.COLOR_LUT == nil then
         auroras.COLOR_LUT = {}
         local idx = 0
-        for i, hexCol in pairs(auroras.COLORS) do
+        for _, hexCol in pairs(auroras.COLORS) do
             local tCol = auroras.parse_hex_color(hexCol)
             if tCol ~= nil then
                 auroras.COLOR_LUT[idx] = tCol