diff --git a/mix.exs b/mix.exs
index 3b99c177..63e66fa8 100644
--- a/mix.exs
+++ b/mix.exs
@@ -60,7 +60,7 @@ defmodule Arrow.MixProject do
       {:guardian, "~> 2.0"},
       {:hackney, "~> 1.9"},
       {:httpoison, "~> 2.2"},
-      {:ja_serializer, github: "mbta/ja_serializer", branch: "master"},
+      {:ja_serializer, "~> 0.18.0"},
       {:jason, "~> 1.0"},
       {:lcov_ex, "~> 0.2", only: [:dev, :test], runtime: false},
       {:mox, "~> 1.2", only: :test},
diff --git a/mix.lock b/mix.lock
index ff81aec0..dd9fddcf 100644
--- a/mix.lock
+++ b/mix.lock
@@ -29,8 +29,8 @@
   "heroicons": {:git, "https://github.com/tailwindlabs/heroicons.git", "88ab3a0d790e6a47404cba02800a6b25d2afae50", [tag: "v2.1.1", sparse: "optimized", depth: 1]},
   "httpoison": {:hex, :httpoison, "2.2.1", "87b7ed6d95db0389f7df02779644171d7319d319178f6680438167d7b69b1f3d", [:mix], [{:hackney, "~> 1.17", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "51364e6d2f429d80e14fe4b5f8e39719cacd03eb3f9a9286e61e216feac2d2df"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
-  "inflex": {:hex, :inflex, "1.10.0", "8366a7696e70e1813aca102e61274addf85d99f4a072b2f9c7984054ea1b9d29", [:mix], [], "hexpm", "7b5ccb9b720c26516f5962dc4565fc26f083ca107b0f6c167048506a125d2df3"},
-  "ja_serializer": {:git, "https://github.com/mbta/ja_serializer.git", "efb1d4489809e31e4b54b4af9e85f0b3ceeb650b", [branch: "master"]},
+  "inflex": {:hex, :inflex, "2.1.0", "a365cf0821a9dacb65067abd95008ca1b0bb7dcdd85ae59965deef2aa062924c", [:mix], [], "hexpm", "14c17d05db4ee9b6d319b0bff1bdf22aa389a25398d1952c7a0b5f3d93162dd8"},
+  "ja_serializer": {:hex, :ja_serializer, "0.18.1", "aef1e749cc0a1e1f4644ba4e8972622513dd5edeb6cb2da4c7c8a6002a337b38", [:mix], [{:inflex, "~> 2.0", [hex: :inflex, repo: "hexpm", optional: false]}, {:plug, "> 1.0.0", [hex: :plug, repo: "hexpm", optional: false]}, {:scrivener, "~> 1.2 or ~> 2.0", [hex: :scrivener, repo: "hexpm", optional: true]}], "hexpm", "b733fefb6459249c66a16a5377f7b6a7134aaa38aaab0cc03e36db07d86d96e6"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "jose": {:hex, :jose, "1.11.10", "a903f5227417bd2a08c8a00a0cbcc458118be84480955e8d251297a425723f83", [:mix, :rebar3], [], "hexpm", "0d6cd36ff8ba174db29148fc112b5842186b68a90ce9fc2b3ec3afe76593e614"},
   "lcov_ex": {:hex, :lcov_ex, "0.3.3", "1745a88e46606c4f86408299f54878b7d0cd22ea3e9c54b0018b6ed631a9ce87", [:mix], [], "hexpm", "ea373ec4d2df213357c5a464be16ab08d1e58e61ea2de784a483780c22a1e74a"},