diff --git a/mix.exs b/mix.exs
index 84f1b10..50e6f4b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -30,7 +30,7 @@ defmodule TzExtra.MixProject do
 
   defp deps do
     [
-      {:tz, "~> 0.26"},
+      {:tz, "~> 0.27"},
       {:ecto, "~> 3.11", optional: true},
       {:jason, "~> 1.4", only: :dev},
       {:ex_doc, "~> 0.34", only: :dev}
diff --git a/mix.lock b/mix.lock
index 5f1164c..879332e 100644
--- a/mix.lock
+++ b/mix.lock
@@ -9,5 +9,5 @@
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
   "telemetry": {:hex, :telemetry, "1.2.1", "68fdfe8d8f05a8428483a97d7aab2f268aaff24b49e0f599faa091f1d4e7f61c", [:rebar3], [], "hexpm", "dad9ce9d8effc621708f99eac538ef1cbe05d6a874dd741de2e689c47feafed5"},
-  "tz": {:hex, :tz, "0.26.6", "4d46178dd5bc4d2c1e78c9affcc3fd46764e29cd2a148c06666edb83cb18629f", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:mint, "~> 1.6", [hex: :mint, repo: "hexpm", optional: true]}], "hexpm", "9ca97ea48b412f2404740867f6c321ee8ce112602035bb79b0b90c9c03174652"},
+  "tz": {:hex, :tz, "0.27.0", "c9e0b634f5f00f4a00c3d415aa947073742f841d842ee627a037b76b9bcaceac", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:mint, "~> 1.6", [hex: :mint, repo: "hexpm", optional: true]}], "hexpm", "fd58ccd130475e0577178d2538488868396215f2620978a32d6621c019a98359"},
 }