diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 438bff0..13730d3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -44,6 +44,29 @@ test:
   script:
     - mix test
 
+build_and_test_i2c_1_x:
+  image: elixir:latest
+  stage: test
+  cache:
+    key: "$CI_JOB_NAME"
+    paths:
+      - deps
+      - _build
+      - .hex
+      - .mix
+  script:
+    - mix local.hex --force
+    - mix local.rebar --force
+    - CI_I2C_1_X=true mix deps.get
+    - mix deps.compile
+    - mix test
+  artifacts:
+    paths:
+      - _build/
+      - deps/
+      - .hex
+      - .mix
+
 integrate:
   image: elixir:latest
   stage: test
diff --git a/mix.exs b/mix.exs
index 0a93fb0..3059c39 100644
--- a/mix.exs
+++ b/mix.exs
@@ -44,7 +44,11 @@ defmodule Wafer.MixProject do
   defp deps do
     [
       {:circuits_gpio, "~> 1.0", optional: true},
-      {:circuits_i2c, "~> 2.0", optional: true},
+      if System.get_env("CI_I2C_1_X") == "true" do
+        {:circuits_i2c, "~> 1.0", optional: true}
+      else
+        {:circuits_i2c, "~> 2.0 or ~> 1.0", optional: true}
+      end,
       {:circuits_spi, "~> 1.3", optional: true},
       {:credo, "~> 1.6", only: ~w[dev test]a, runtime: false},
       {:earmark, "~> 1.4", only: ~w[dev test]a},