diff --git a/mix.lock b/mix.lock
index f050e82..e6b4e48 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,7 +1,7 @@
 %{
   "beam_notify": {:hex, :beam_notify, "1.1.1", "da7dd04f16120bcab71f01ff81607ea38ad78af859cd87fad2012eac8feab034", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "5a09fc8449171da423f781de16b95cdec52763e60308345de6f15358c2382a42"},
   "castore": {:hex, :castore, "1.0.18", "5e43ef0ec7d31195dfa5a65a86e6131db999d074179d2ba5a8de11fe14570f55", [:mix], [], "hexpm", "f393e4fe6317829b158fb74d86eb681f737d2fe326aa61ccf6293c4104957e34"},
-  "circuits_gpio": {:hex, :circuits_gpio, "2.1.3", "7f5b8262a7ee39729b11b42cb5ce3216145649aa315fd08fc3405ca7139382b4", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "8616d3085f0e3b794f330cef8d4200ed83a0a2a8edf011d75d9e024299118220"},
+  "circuits_gpio": {:hex, :circuits_gpio, "2.2.0", "11052ae5d06889aa5996a3ad4806c677fbbf182df447fdd414a6008f8d548e7e", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "61a36cee4c34822ebcfcad312c72a2b6ba84fbcc34b59f9563c7fe900241e7ad"},
   "circuits_i2c": {:hex, :circuits_i2c, "2.1.0", "0656ea5d106744c498a8cd778f39c0685ab574e3da7159814cfbfe709001f0e5", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "3751a875a9d728080fdbc5fd352f728d4746a82e17e52f4444c406200349f6ac"},
   "circuits_spi": {:hex, :circuits_spi, "2.0.4", "b75f64c0401e3c64319dcfc76a9bc17466e4469adc5daf34165f4c4b11cf12ee", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "ccf034065091f26c624dee777ea3f48ce64696af812622e1d060b2cffdbf90e4"},
   "circuits_uart": {:hex, :circuits_uart, "1.6.0", "259e8126b4004648e1bba6da5827b9e473b7e09e1eb4357f0026a1d9f274fce2", [:mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "9f0bdf612706b16beb2026a9e316cc313b919c35b663c1177d374b1f7330b790"},