diff --git a/src/Imgix/UrlBuilder.php b/src/Imgix/UrlBuilder.php
index a766a09..aef9099 100644
--- a/src/Imgix/UrlBuilder.php
+++ b/src/Imgix/UrlBuilder.php
@@ -15,7 +15,7 @@ class UrlBuilder {
     // constants cannot be dynamically assigned; keeping as a class variable instead
     private $targetWidths;
 
-    public function __construct($domain, $useHttps = false, $signKey = "", $includeLibraryParam = true) {
+    public function __construct($domain, $useHttps = true, $signKey = "", $includeLibraryParam = true) {
 
         if (!is_string($domain)) {
             throw new \InvalidArgumentException("UrlBuilder must be passed a string domain");
diff --git a/tests/Imgix/Tests/UrlBuilderTest.php b/tests/Imgix/Tests/UrlBuilderTest.php
index b288bc3..1ef2976 100644
--- a/tests/Imgix/Tests/UrlBuilderTest.php
+++ b/tests/Imgix/Tests/UrlBuilderTest.php
@@ -20,6 +20,19 @@ public function testExamplePlain() {
         $this->assertEquals("http://demos.imgix.net/bridge.png?h=100&w=100", $url);
     }
 
+    public function testExamplePlainUsesHttpsByDefault() {
+        // Test default `UrlBuilder` uses https by default.
+        // Construct the builder with a `$domain` __only__.
+        $builder = new UrlBuilder("demos.imgix.net");
+        // Use `setIncludeLibraryParam`.
+        $builder->setIncludeLibraryParam(false);
+        // Construct a url in accordance with the other tests.
+        $params = array("w" => 100, "h" => 100);
+        // Create the url with the specified `$path` and `$params`.
+        $url = $builder->createURL("bridge.png", $params); 
+        $this->assertEquals("https://demos.imgix.net/bridge.png?h=100&w=100", $url);
+    }
+
     public function testExamplePlainHttps() {
         $builder = new UrlBuilder("demos.imgix.net", false, "",  false);