diff --git a/nvim/plugin/filetype.lua b/nvim/plugin/filetype.lua
index 81ec0a1..01d5357 100644
--- a/nvim/plugin/filetype.lua
+++ b/nvim/plugin/filetype.lua
@@ -6,4 +6,8 @@ vim.filetype.add {
     pcss = "scss",
     theme = "php",
   },
+
+  filename = {
+    ["composer.lock"] = "json",
+  },
 }