diff --git a/lib/jsonapi/plugs/query_parser.ex b/lib/jsonapi/plugs/query_parser.ex
index 2335a4a6..e9df8f6d 100644
--- a/lib/jsonapi/plugs/query_parser.ex
+++ b/lib/jsonapi/plugs/query_parser.ex
@@ -182,6 +182,7 @@ defmodule JSONAPI.QueryParser do
       |> Enum.map(fn field ->
         valid_sort = Keyword.get(opts, :sort, [])
         [_, direction, field] = Regex.run(~r/(-?)(\S*)/, field)
+        field = underscore(field)
 
         unless field in valid_sort do
           raise InvalidQuery, resource: config.view.type(), param: field, param_type: :sort
diff --git a/test/jsonapi/plugs/query_parser_test.exs b/test/jsonapi/plugs/query_parser_test.exs
index e647f207..2a3a5c12 100644
--- a/test/jsonapi/plugs/query_parser_test.exs
+++ b/test/jsonapi/plugs/query_parser_test.exs
@@ -49,11 +49,13 @@ defmodule JSONAPI.QueryParserTest do
   end
 
   test "parse_sort/2 turns sorts into valid ecto sorts" do
-    config = struct(Config, opts: [sort: ~w(name title)], view: MyView)
+    config = struct(Config, opts: [sort: ~w(name title updated_at)], view: MyView)
     assert parse_sort(config, "name,title").sort == [asc: :name, asc: :title]
     assert parse_sort(config, "name").sort == [asc: :name]
     assert parse_sort(config, "-name").sort == [desc: :name]
     assert parse_sort(config, "name,-title").sort == [asc: :name, desc: :title]
+    assert parse_sort(config, "updatedAt").sort == [asc: :updated_at]
+    assert parse_sort(config, "-updatedAt").sort == [desc: :updated_at]
   end
 
   test "parse_sort/2 raises on invalid sorts" do