diff --git a/README.md b/README.md
index f278aa0..b886009 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - uses: sterlingwes/gh-pages-deploy-action@v1.1
+      - uses: sterlingwes/gh-pages-deploy-action@v1.3
         with:
           access-token: ${{ secrets.ACCESS_TOKEN }}
           source-directory: public
@@ -31,13 +31,14 @@ jobs:
 
 ## Options
 
-| Name               | Description                                                                                                                                                                                          | Required? (default) |
-| ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------- |
-| `access-token`     | Required to push chages to your deployment branch. You can get this from your Github Settings > Developer Settings > [Personal Access Tokens](https://github.com/settings/tokens). **Note** that if you use a fine-grained token with content permissions you'll need to prefix the value of your secret with your username, ie: `myname:github_pat_*****`                    | Yes                 |
-| `source-directory` | The name of the subfolder that holds the contents of the site you want deployed. This folder can be generated by your build command, or pre-exist.                                                   | Yes                 |
-| `build-command`    | The command you want this Action to run to generate your static site files in the `source-directory` you specify.                                                                                    | Yes                 |
-| `deploy-branch`    | The branch Github Pages is setup to source your site's files from. For the yourname.github.io site, this is typically the master branch. For /reponame subfolder deploys, `gh-pages` is the default. | No (gh-pages)       |
-| `custom-domain`    | This is the domain that this Action will write to a `CNAME` file for you on your deploy branch, to enable a custom domain for your Github Pages site.                                                | No                  |
+| Name               | Description                                                                                                                                                                                                                                                                                                                                                | Required? (default) |
+| ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------- |
+| `access-token`     | Required to push chages to your deployment branch. You can get this from your Github Settings > Developer Settings > [Personal Access Tokens](https://github.com/settings/tokens). **Note** that if you use a fine-grained token with content permissions you'll need to prefix the value of your secret with your username, ie: `myname:github_pat_*****` | Yes                 |
+| `source-directory` | The name of the subfolder that holds the contents of the site you want deployed. This folder can be generated by your build command, or pre-exist.                                                                                                                                                                                                         | Yes                 |
+| `build-command`    | The command you want this Action to run to generate your static site files in the `source-directory` you specify.                                                                                                                                                                                                                                          | Yes                 |
+| `deploy-branch`    | The branch Github Pages is setup to source your site's files from. For the yourname.github.io site, this is typically the master branch. For /reponame subfolder deploys, `gh-pages` is the default.                                                                                                                                                       | No (gh-pages)       |
+| `custom-domain`    | This is the domain that this Action will write to a `CNAME` file for you on your deploy branch, to enable a custom domain for your Github Pages site.                                                                                                                                                                                                      | No                  |
+| `auto-install`     | Whether to automatically install dependencies before running the build command (dependency manager detected based on presence of yarn.lock for yarn vs. npm).                                                                                                                                                                                              | No (Yes)            |
 
 ## Related
 
diff --git a/action.yml b/action.yml
index 9f42d2c..2923933 100644
--- a/action.yml
+++ b/action.yml
@@ -23,6 +23,10 @@ inputs:
     description: 'The custom domain you want your Github Pages site to be served from.'
     required: false
     default: ''
+  auto-install:
+    description: 'Whether to automatically install dependencies before running the build command.'
+    required: false
+    default: 'yes'
 runs:
   using: 'node12'
   main: 'dist/index.js'
diff --git a/index.js b/index.js
index a5a444f..8abaf6d 100644
--- a/index.js
+++ b/index.js
@@ -30,13 +30,16 @@ async function run() {
       return;
     }
 
-    let pkgManager = (await ioUtil.exists('./yarn.lock')) ? 'yarn' : 'npm';
-    if (pkgManager === 'npm' && (await ioUtil.exists('./bun.lockb'))) {
-      pkgManager = 'bun';
+    const autoInstallInput = core.getInput('auto-install');
+    const autoInstall = autoInstallInput === 'true' || autoInstallInput === 'yes';
+    if (autoInstall) {
+      const pkgManager = (await ioUtil.exists('./yarn.lock')) ? 'yarn' : 'npm';
+      console.log(`Installing your site's dependencies using ${pkgManager}.`);
+      await exec.exec(`${pkgManager} install`);
+      console.log('Finished installing dependencies.');
+    } else {
+      console.log('Skipping dependency installation (auto-install is disabled).');
     }
-    console.log(`Installing your site's dependencies using ${pkgManager}.`);
-    await exec.exec(`${pkgManager} install`);
-    console.log('Finished installing dependencies.');
 
     const buildCommand = core.getInput('build-command');
     if (!buildCommand) {
diff --git a/package.json b/package.json
index 2f46565..3f0a418 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gh-pages-deploy-action",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "GitHub Action to build and deploy a Github Pages site using the build command & output folder you specify.",
   "main": "index.js",
   "scripts": {