diff --git a/README.md b/README.md
index 1f697a8..e314f8a 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,10 @@
       # `deploy all`.
       # Required.
       dep: deploy
+
+      # Specifies a sub directory within the repository to deploy
+      # Optional
+      sub-directory: "..."
       
       # Config options for the Deployer. Same as the `-o` flag in the CLI.
       # Optional.
diff --git a/action.yaml b/action.yaml
index 2e07c45..74aadcb 100644
--- a/action.yaml
+++ b/action.yaml
@@ -8,6 +8,11 @@ inputs:
     required: true
     description: The command.
 
+  sub-directory:
+    required: false
+    default: ''
+    description: Specifies a sub directory within the repository to deploy.
+
   options:
     required: false
     default: ''
diff --git a/index.js b/index.js
index c7c7456..c87cad6 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
 import core from '@actions/core'
-import { $, fs } from 'zx'
+import { $, fs, cd } from 'zx'
 
 void async function main() {
   try {
@@ -52,6 +52,11 @@ async function ssh() {
 
 async function dep() {
   let dep = core.getInput('deployer-binary')
+  let subDirectory = core.getInput('sub-directory').trim()
+
+  if (subDirectory !== '') {
+    cd(subDirectory)
+  }
 
   if (dep === '')
     for (let c of ['vendor/bin/deployer.phar', 'vendor/bin/dep', 'deployer.phar']) {
@@ -69,15 +74,15 @@ async function dep() {
       if (lock['packages']) {
         version = lock['packages']
           .find(p => p.name === 'deployer/deployer')
-          .version
+          ?.version
       }
-      if (version === '' && lock['packages-dev']) {
+      if ((version === '' || typeof version === 'undefined') && lock['packages-dev']) {
         version = lock['packages-dev']
           .find(p => p.name === 'deployer/deployer')
-          .version
+          ?.version
       }
     }
-    if (version === '') {
+    if (version === '' || typeof version === 'undefined') {
       throw new Error('Deployer binary not found. Please specify deployer-binary or deployer-version.')
     }
     version = version.replace(/^v/, '')