diff --git a/nvim/files/lua/set.lua b/nvim/files/lua/set.lua
index 82e3b32..a036e56 100644
--- a/nvim/files/lua/set.lua
+++ b/nvim/files/lua/set.lua
@@ -95,3 +95,10 @@ vim.api.nvim_create_autocmd("TextYankPost", {
 		vim.highlight.on_yank({ timeout = 100 })
 	end,
 })
+
+-- Treat .jsonl files as JSON for syntax highlighting and tree-sitter
+vim.filetype.add({
+	extension = {
+		jsonl = "json",
+	},
+})