diff --git a/.circleci/config.yml b/.circleci/config.yml
index 037707e..89fa491 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,7 +1,7 @@
 version: 2.1
 
 latest: &latest
-  pattern: "^1.14.2-erlang-25.*$"
+  pattern: "^1.15.7-erlang-26.*$"
 
 jobs:
   check-license:
@@ -34,6 +34,7 @@ jobs:
           keys:
             - v1-mix-cache-<< parameters.tag >>-{{ checksum "mix.lock" }}
       - run: mix deps.get
+      - run: MIX_ENV=test mix compile --warnings-as-errors
       - run: mix test
       - when:
           condition:
@@ -60,7 +61,8 @@ workflows:
           matrix:
             parameters:
               tag: [
-                1.14.2-erlang-25.2-alpine-3.17.0,
+                1.15.7-erlang-26.1.2-alpine-3.18.4,
+                1.14.4-erlang-25.3.2-alpine-3.17.3,
                 1.13.4-erlang-24.3.4-alpine-3.15.3,
                 1.12.3-erlang-24.3.4-alpine-3.15.3,
                 1.11.4-erlang-23.3.4.13-alpine-3.15.3,
diff --git a/README.md b/README.md
index 695ca86..8ffc701 100644
--- a/README.md
+++ b/README.md
@@ -5,10 +5,14 @@
 [![CircleCI](https://circleci.com/gh/elixir-circuits/circuits_spi.svg?style=svg)](https://circleci.com/gh/elixir-circuits/circuits_spi)
 [![REUSE status](https://api.reuse.software/badge/github.com/elixir-circuits/circuits_spi)](https://api.reuse.software/info/github.com/elixir-circuits/circuits_spi)
 
-`Circuits.SPI` provides high level abstractions for interfacing to SPI buses on
-Linux platforms. Internally, it uses the [Linux device
-interface](https://elixir.bootlin.com/linux/latest/source/Documentation/spi/spidev)
-so that it does not require board-dependent code.
+`Circuits.SPI` lets you communicate with hardware devices using the SPI
+protocol.
+
+*This is the v1 maintenance branch. It is still used a lot in production.
+Circuits.SPI v2 is available at now, see the [main development
+branch](https://github.com/elixir-circuits/circuits_spi)*
+
+If you're coming from Elixir/ALE, check out our [porting guide](PORTING.md).
 
 ## Getting started
 
@@ -17,7 +21,7 @@ support, then add `circuits_spi` like any other Elixir library:
 
 ```elixir
 def deps do
-  [{:circuits_spi, "~> 1.3"}]
+  [{:circuits_spi, "~> 1.4"}]
 end
 ```
 
diff --git a/lib/spi/spi_nif.ex b/lib/spi/spi_nif.ex
index 823ad44..07b2fdc 100644
--- a/lib/spi/spi_nif.ex
+++ b/lib/spi/spi_nif.ex
@@ -3,18 +3,17 @@
 # SPDX-License-Identifier: Apache-2.0
 
 defmodule Circuits.SPI.Nif do
-  @on_load {:load_nif, 0}
-  @compile {:autoload, false}
-
   @moduledoc false
 
-  def load_nif() do
+  defp load_nif() do
     nif_binary = Application.app_dir(:circuits_spi, "priv/spi_nif")
     :erlang.load_nif(to_charlist(nif_binary), 0)
   end
 
-  def open(_bus_name, _mode, _bits_per_word, _speed_hz, _delay_us, _lsb_first) do
-    :erlang.nif_error(:nif_not_loaded)
+  def open(bus_name, mode, bits_per_word, speed_hz, delay_us, lsb_first) do
+    with :ok <- load_nif() do
+      apply(__MODULE__, :open, [bus_name, mode, bits_per_word, speed_hz, delay_us, lsb_first])
+    end
   end
 
   def config(_ref) do
@@ -30,7 +29,8 @@ defmodule Circuits.SPI.Nif do
   end
 
   def info() do
-    :erlang.nif_error(:nif_not_loaded)
+    :ok = load_nif()
+    apply(__MODULE__, :info, [])
   end
 
   def max_transfer_size() do
diff --git a/mix.lock b/mix.lock
index 0123c8a..ac7f3d7 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,15 +1,15 @@
 %{
   "bunt": {:hex, :bunt, "0.2.1", "e2d4792f7bc0ced7583ab54922808919518d0e57ee162901a16a1b6664ef3b14", [:mix], [], "hexpm", "a330bfb4245239787b15005e66ae6845c9cd524a288f0d141c148b02603777a5"},
-  "credo": {:hex, :credo, "1.6.7", "323f5734350fd23a456f2688b9430e7d517afb313fbd38671b8a4449798a7854", [:mix], [{:bunt, "~> 0.2.1", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "41e110bfb007f7eda7f897c10bf019ceab9a0b269ce79f015d54b0dcf4fc7dd3"},
-  "dialyxir": {:hex, :dialyxir, "1.2.0", "58344b3e87c2e7095304c81a9ae65cb68b613e28340690dfe1a5597fd08dec37", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "61072136427a851674cab81762be4dbeae7679f85b1272b6d25c3a839aff8463"},
-  "earmark_parser": {:hex, :earmark_parser, "1.4.29", "149d50dcb3a93d9f3d6f3ecf18c918fb5a2d3c001b5d3305c926cddfbd33355b", [:mix], [], "hexpm", "4902af1b3eb139016aed210888748db8070b8125c2342ce3dcae4f38dcc63503"},
-  "elixir_make": {:hex, :elixir_make, "0.7.3", "c37fdae1b52d2cc51069713a58c2314877c1ad40800a57efb213f77b078a460d", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}], "hexpm", "24ada3e3996adbed1fa024ca14995ef2ba3d0d17b678b0f3f2b1f66e6ce2b274"},
+  "credo": {:hex, :credo, "1.7.1", "6e26bbcc9e22eefbff7e43188e69924e78818e2fe6282487d0703652bc20fd62", [:mix], [{:bunt, "~> 0.2.1", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "e9871c6095a4c0381c89b6aa98bc6260a8ba6addccf7f6a53da8849c748a58a2"},
+  "dialyxir": {:hex, :dialyxir, "1.4.2", "764a6e8e7a354f0ba95d58418178d486065ead1f69ad89782817c296d0d746a5", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "516603d8067b2fd585319e4b13d3674ad4f314a5902ba8130cd97dc902ce6bbd"},
+  "earmark_parser": {:hex, :earmark_parser, "1.4.38", "b42252eddf63bda05554ba8be93a1262dc0920c721f1aaf989f5de0f73a2e367", [:mix], [], "hexpm", "2cd0907795aaef0c7e8442e376633c5b3bd6edc8dbbdc539b22f095501c1cdb6"},
+  "elixir_make": {:hex, :elixir_make, "0.7.7", "7128c60c2476019ed978210c245badf08b03dbec4f24d05790ef791da11aa17c", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}], "hexpm", "5bc19fff950fad52bbe5f211b12db9ec82c6b34a9647da0c2224b8b8464c7e6c"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
-  "ex_doc": {:hex, :ex_doc, "0.29.1", "b1c652fa5f92ee9cf15c75271168027f92039b3877094290a75abcaac82a9f77", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "b7745fa6374a36daf484e2a2012274950e084815b936b1319aeebcf7809574f6"},
+  "ex_doc": {:hex, :ex_doc, "0.30.9", "d691453495c47434c0f2052b08dd91cc32bc4e1a218f86884563448ee2502dd2", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "d7aaaf21e95dc5cddabf89063327e96867d00013963eadf2c6ad135506a8bc10"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
-  "jason": {:hex, :jason, "1.4.0", "e855647bc964a44e2f67df589ccf49105ae039d4179db7f6271dfd3843dc27e6", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "79a3791085b2a0f743ca04cec0f7be26443738779d09302e01318f97bdb82121"},
-  "makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
-  "makeup_elixir": {:hex, :makeup_elixir, "0.16.0", "f8c570a0d33f8039513fbccaf7108c5d750f47d8defd44088371191b76492b0b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "28b2cbdc13960a46ae9a8858c4bebdec3c9a6d7b4b9e7f4ed1502f8159f338e7"},
-  "makeup_erlang": {:hex, :makeup_erlang, "0.1.1", "3fcb7f09eb9d98dc4d208f49cc955a34218fc41ff6b84df7c75b3e6e533cc65f", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "174d0809e98a4ef0b3309256cbf97101c6ec01c4ab0b23e926a9e17df2077cbb"},
-  "nimble_parsec": {:hex, :nimble_parsec, "1.2.3", "244836e6e3f1200c7f30cb56733fd808744eca61fd182f731eac4af635cc6d0b", [:mix], [], "hexpm", "c8d789e39b9131acf7b99291e93dae60ab48ef14a7ee9d58c6964f59efb570b0"},
+  "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},
+  "makeup": {:hex, :makeup, "1.1.1", "fa0bc768698053b2b3869fa8a62616501ff9d11a562f3ce39580d60860c3a55e", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "5dc62fbdd0de44de194898b6710692490be74baa02d9d108bc29f007783b0b48"},
+  "makeup_elixir": {:hex, :makeup_elixir, "0.16.1", "cc9e3ca312f1cfeccc572b37a09980287e243648108384b97ff2b76e505c3555", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "e127a341ad1b209bd80f7bd1620a15693a9908ed780c3b763bccf7d200c767c6"},
+  "makeup_erlang": {:hex, :makeup_erlang, "0.1.2", "ad87296a092a46e03b7e9b0be7631ddcf64c790fa68a9ef5323b6cbb36affc72", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "f3f5a1ca93ce6e092d92b6d9c049bcda58a3b617a8d888f8e7231c85630e8108"},
+  "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
 }