diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..bd79cae
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,50 @@
+name: Elixir CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+env:
+  MIX_ENV: test
+  EXSRTP_BUILD: true
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        include:
+          - otp_version: 25.3
+            elixir_version: 1.15
+
+          - otp_version: 27.2
+            elixir_version: 1.18
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: erlef/setup-beam@v1
+        with:
+          elixir-version: ${{ matrix.elixir_version }}
+          otp-version: ${{ matrix.otp_version }}
+
+      - name: Install dependencies
+        run: mix deps.get
+      - name: Run tests
+        run: mix test --warnings-as-errors
+      - name: Run Credo
+        run: mix credo --strict
+
+  format:
+    runs-on: ubuntu-latest
+    name: mix format
+    steps:
+      - uses: actions/checkout@v4
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: 27.2
+          elixir-version: 1.18
+      - run: mix deps.get
+      - run: mix format --check-formatted
diff --git a/README.md b/README.md
index f450d13..865af85 100644
--- a/README.md
+++ b/README.md
@@ -28,13 +28,10 @@ The library supports multiple backends for cryptographic operations:
 For the rust backend, we offer precompiled NIFs for various platforms, so if your platform is supported, you can use the rust backend without needing to compile anything. However, if your platform is not supported or you want to compile from source, you need to have the rust toolchain installed on your system. You need aslo to add `rustler` dependency and set force build config:
 
 ```elixir
+{:ex_srtp, "~> 0.4.0", system_env: %{"EXSRTP_BUILD" => "1"}}
 {:rustler, "~> 0.37.0"}
 ```
 
-```elixir
-config :rust_precompiled, :force_build, ex_srtp: true
-```
-
 ### Rust Backend and AES-GCM
 The rust backend is using [graviola](https://github.com/ctz/graviola) for aes-gcm which only works on `aarch64` and `x86_64` architecture with some CPU features. If you are using an older CPU or different architecture, you should use the `elixir` backend or do not use AES_GCM crypto profile.
 
diff --git a/lib/ex_srtp/backend/rust_crypto.ex b/lib/ex_srtp/backend/rust_crypto.ex
index ed5321d..f9e59d8 100644
--- a/lib/ex_srtp/backend/rust_crypto.ex
+++ b/lib/ex_srtp/backend/rust_crypto.ex
@@ -7,6 +7,7 @@ defmodule ExSRTP.Backend.RustCrypto.Native do
     crate: "ex_srtp",
     base_url: "https://github.com/elixir-streaming/ex_srtp/releases/download/v#{version}",
     version: version,
+    force_build: System.get_env("EXSRTP_BUILD") in ["1", "true"],
     targets: ~w(
       aarch64-apple-darwin
       aarch64-unknown-linux-gnu
diff --git a/lib/ex_srtp/cipher/aes_gcm.ex b/lib/ex_srtp/cipher/aes_gcm.ex
index bee6070..c653457 100644
--- a/lib/ex_srtp/cipher/aes_gcm.ex
+++ b/lib/ex_srtp/cipher/aes_gcm.ex
@@ -1,5 +1,6 @@
 defmodule ExSRTP.Cipher.AesGcm do
   @moduledoc """
+  An `ExSRTP.Cipher` implementation using AES-GCM (as per RFC 7714).
   """
 
   import Bitwise
diff --git a/mix.exs b/mix.exs
index efeb507..3d537b5 100644
--- a/mix.exs
+++ b/mix.exs
@@ -31,7 +31,8 @@ defmodule ExSRTP.MixProject do
       {:ex_rtcp, "~> 0.4.0"},
       {:rustler, "~> 0.37", runtime: false, optional: true},
       {:rustler_precompiled, "~> 0.8"},
-      {:ex_doc, "~> 0.30", only: :dev, runtime: false}
+      {:ex_doc, "~> 0.30", only: :dev, runtime: false},
+      {:credo, "~> 1.7", only: [:dev, :test], runtime: false}
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index 481ff31..22f2d33 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,9 +1,12 @@
 %{
+  "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
   "castore": {:hex, :castore, "1.0.17", "4f9770d2d45fbd91dcf6bd404cf64e7e58fed04fadda0923dc32acca0badffa2", [:mix], [], "hexpm", "12d24b9d80b910dd3953e165636d68f147a31db945d2dcb9365e441f8b5351e5"},
+  "credo": {:hex, :credo, "1.7.15", "283da72eeb2fd3ccf7248f4941a0527efb97afa224bcdef30b4b580bc8258e1c", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "291e8645ea3fea7481829f1e1eb0881b8395db212821338e577a90bf225c5607"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.44", "f20830dd6b5c77afe2b063777ddbbff09f9759396500cdbe7523efd58d7a339c", [:mix], [], "hexpm", "4778ac752b4701a5599215f7030989c989ffdc4f6df457c5f36938cc2d2a2750"},
   "ex_doc": {:hex, :ex_doc, "0.39.3", "519c6bc7e84a2918b737aec7ef48b96aa4698342927d080437f61395d361dcee", [:mix], [{:earmark_parser, "~> 1.4.44", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "0590955cf7ad3b625780ee1c1ea627c28a78948c6c0a9b0322bd976a079996e1"},
   "ex_rtcp": {:hex, :ex_rtcp, "0.4.0", "f9e515462a9581798ff6413583a25174cfd2101c94a2ebee871cca7639886f0a", [:mix], [], "hexpm", "28956602cf210d692fcdaf3f60ca49681634e1deb28ace41246aee61ee22dc3b"},
   "ex_rtp": {:hex, :ex_rtp, "0.4.0", "1f1b5c1440a904706011e3afbb41741f5da309ce251cb986690ce9fd82636658", [:mix], [], "hexpm", "0f72d80d5953a62057270040f0f1ee6f955c08eeae82ac659c038001d7d5a790"},
+  "file_system": {:hex, :file_system, "1.1.1", "31864f4685b0148f25bd3fbef2b1228457c0c89024ad67f7a81a3ffbc0bbad3a", [:mix], [], "hexpm", "7a15ff97dfe526aeefb090a7a9d3d03aa907e100e262a0f8f7746b78f8f87a5d"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "makeup": {:hex, :makeup, "1.2.1", "e90ac1c65589ef354378def3ba19d401e739ee7ee06fb47f94c687016e3713d1", [:mix], [{:nimble_parsec, "~> 1.4", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "d36484867b0bae0fea568d10131197a4c2e47056a6fbe84922bf6ba71c8d17ce"},
   "makeup_elixir": {:hex, :makeup_elixir, "1.0.1", "e928a4f984e795e41e3abd27bfc09f51db16ab8ba1aebdba2b3a575437efafc2", [: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", "7284900d412a3e5cfd97fdaed4f5ed389b8f2b4cb49efc0eb3bd10e2febf9507"},
diff --git a/test/ex_srtp_test.exs b/test/ex_srtp_test.exs
index d6887c1..0b652e4 100644
--- a/test/ex_srtp_test.exs
+++ b/test/ex_srtp_test.exs
@@ -168,9 +168,7 @@ defmodule ExSRTPTest do
           156, 66, 244, 203, 218, 58, 80, 24, 60, 28, 171, 30, 89, 192, 155, 19, 59, 128, 0, 0, 1,
           139, 226, 152, 17, 40, 71, 251, 110, 11, 235>>
 
-      assert {:ok, unprotected_packets, _srtp} =
-               ExSRTP.Backend.RustCrypto.unprotect_rtcp(protected_rtcp, srtp)
-
+      assert {:ok, unprotected_packets, _srtp} = RustCrypto.unprotect_rtcp(protected_rtcp, srtp)
       assert unprotected_packets == packets
     end
 
@@ -280,7 +278,7 @@ defmodule ExSRTPTest do
       end
 
       test "protect and unprotect", %{srtp: srtp, rust_srtp: rust_srtp} do
-        original_packets = packets(10000)
+        original_packets = packets(10_000)
 
         {encrypted_packets, rust_srtp} =
           Enum.map_reduce(original_packets, rust_srtp, fn pkt, srtp ->
@@ -388,7 +386,7 @@ defmodule ExSRTPTest do
     |> Enum.take(size)
   end
 
-  defp rand_payload() do
+  defp rand_payload do
     len = :rand.uniform(1000) + 500
     :crypto.strong_rand_bytes(len)
   end