diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 499dba5..416c419 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -131,6 +131,18 @@ jobs:
         if: always()
         uses: crazy-max/ghaction-dump-context@v2
 
+  colima-start-args:
+    runs-on: macos-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up Docker
+        uses: ./
+        env:
+          COLIMA_START_ARGS: --cpu 4 --memory 8 --disk 32 --dns 1.1.1.1 --dns 8.8.8.8 --dns-host example.com=1.2.3.4
+
   build-linux:
     runs-on: ubuntu-latest
     steps:
diff --git a/README.md b/README.md
index 41b35fa..70f1974 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ ___
 * [Usage](#usage)
   * [Quick start](#quick-start)
   * [Daemon configuration](#daemon-configuration)
+  * [Define custom `colima start` arguments (macOS)](#define-custom-colima-start-arguments-macos)
 * [Customizing](#customizing)
   * [inputs](#inputs)
 * [Notes](#notes)
@@ -71,6 +72,28 @@ jobs:
             }
 ```
 
+### Define custom `colima start` arguments (macOS)
+
+You can define custom [`colima start` arguments](https://github.com/abiosoft/colima#customizing-the-vm)
+using the `COLIMA_START_ARGS` environment variable to customize the VM:
+
+```yaml
+name: ci
+
+on:
+  push:
+
+jobs:
+  docker:
+    runs-on: macos-latest
+    steps:
+      -
+        name: Set up Docker
+        uses: crazy-max/ghaction-setup-docker@v1
+        env:
+          COLIMA_START_ARGS: --cpu 4 --memory 8 --disk 32
+```
+
 ## Customizing
 
 ### inputs