diff --git a/docker/Dockerfile b/docker/Dockerfile
index 125579ebd..2062fb35d 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -7,16 +7,20 @@ ENV SENDGRID_API_KEY $SENDGRID_API_KEY
 WORKDIR /root
 
 # install Prism
-ADD https://raw.githubusercontent.com/stoplightio/prism/master/install.sh install.sh
+ADD https://raw.githubusercontent.com/stoplightio/prism/master/install install.sh
+RUN apt-get update && apt-get install dos2unix
 RUN chmod +x ./install.sh && sync && \
+    dos2unix ./install.sh && \
     ./install.sh && \
     rm ./install.sh
 
+
 # set up default Twilio SendGrid env
 WORKDIR /root
 
 RUN mkdir sendgrid-php
 COPY entrypoint.sh entrypoint.sh
 RUN chmod +x entrypoint.sh
+RUN dos2unix ./entrypoint.sh
 ENTRYPOINT ["./entrypoint.sh"]
 CMD ["--mock"]
diff --git a/lib/SendGrid.php b/lib/SendGrid.php
index 08ee1d6e8..8ccf10011 100644
--- a/lib/SendGrid.php
+++ b/lib/SendGrid.php
@@ -34,7 +34,7 @@ class SendGrid
      * Setup the HTTP Client
      *
      * @param string $apiKey  Your Twilio SendGrid API Key.
-     * @param array  $options An array of options, currently only "host", "curl" and
+     * @param array  $options An array of options, currently only "host", "curl", "path" and
      *                        "impersonateSubuser" are implemented.
      */
     public function __construct($apiKey, $options = array())
@@ -48,6 +48,9 @@ public function __construct($apiKey, $options = array())
         $host = isset($options['host']) ? $options['host'] :
             'https://api.sendgrid.com';
 
+        $path = isset($options['path']) ? $options['path'] :
+            '/v3';
+
         if (!empty($options['impersonateSubuser'])) {
             $headers[] = 'On-Behalf-Of: '. $options['impersonateSubuser'];
         }
@@ -57,7 +60,7 @@ public function __construct($apiKey, $options = array())
         $this->client = new \SendGrid\Client(
             $host,
             $headers,
-            '/v3',
+            $path,
             null,
             $curlOptions
         );
diff --git a/test/unit/SendGridTest.php b/test/unit/SendGridTest.php
index 274e7aa4e..9221a2889 100644
--- a/test/unit/SendGridTest.php
+++ b/test/unit/SendGridTest.php
@@ -85,4 +85,26 @@ public function testCanConnectToSendGridApi()
             $sg5->client->getHeaders()
         );
     }
+    
+
+    /**
+     * Test that user can override the path when instantiating a new SendGrid client
+     */
+    public function testCanOverridePath()
+    {
+        $opts['path'] = 'v4';
+
+        $sg = new \SendGrid(self::$apiKey, $opts);
+        $headers = [
+            'Authorization: Bearer ' . self::$apiKey,
+            'User-Agent: sendgrid/' . $sg->version . ';php',
+            'Accept: application/json'
+        ];
+
+        $this->assertEquals(
+            $sg->client->getHost(),
+            'https://api.sendgrid.com',
+            '/v4'
+        );
+    }
 }