diff --git a/.env b/.env
new file mode 100644
index 0000000..5b53677
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+INSTALL_PRESTISSIMO=false
\ No newline at end of file
diff --git a/README.md b/README.md
index e4b5f5b..c8545e4 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,7 @@ It's like Laravel Homestead but for Docker instead of Vagrant.
 		- [Run a Docker Virtual Host](#Run-Docker-Virtual-Host)
 		- [Find your Docker IP Address](#Find-Docker-IP-Address)
 		- [Use custom Domain](#Use-custom-Domain)
+		- [Optional Features](#Optional-Features)
 		- [Debugging](#debugging)
 - [Help & Questions](#Help)
 
@@ -822,6 +823,13 @@ server_name laravel.dev;
 ```
 
 
+<br>
+<a name="Optional-Features"></a>
+### Optional Features
+#### prestissimo
+[prestissimo](https://github.com/hirak/prestissimo) is a plugin for composer which enables parallel install functionality. You can enable prestissimo by setting `INSTALL_PRESTISSIMO=true` in the `.env` file in the Laradock directory.
+
+
 <br>
 <a name="debugging"></a>
 ### Debugging
diff --git a/docker-compose.yml b/docker-compose.yml
index 087cea3..9d13ae6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -156,7 +156,7 @@ services:
         build:
             context: ./workspace
             args:
-                INSTALL_PRESTISSIMO: ${INSTALL_PRESTISSIMO}
+                - INSTALL_PRESTISSIMO=${INSTALL_PRESTISSIMO}
         volumes_from:
             - application
         tty: true