diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61b182e..06cb817 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2.2.0
+
+Remove use of img/img1 as we are now multiplexing with http2
+Add option allowwebp to enable webp optimization even for not resized images
+Allow =0 width, with >= height to resize based on set height
+
 ## 2.1.1
 
 Fix malformed imageSlug parameter in buildUrl
diff --git a/Tests/Units/BuilderTest.php b/Tests/Units/BuilderTest.php
index 48ed488..61d6c46 100644
--- a/Tests/Units/BuilderTest.php
+++ b/Tests/Units/BuilderTest.php
@@ -25,11 +25,11 @@ public function testNonChangingUrl(): void
         $url = $this->manager->buildUrl($baseUrl);
         $this->assertSame($baseUrl, $url);
 
-        $baseUrl = '//img1.mapado.net/2014/1/1/my-image.png';
+        $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
         $url = $this->manager->buildUrl($baseUrl);
         $this->assertSame($baseUrl, $url);
 
-        $baseUrl = '//img2.mapado.net/2014/1/1/my-image.png';
+        $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
         $url = $this->manager->buildUrl($baseUrl);
         $this->assertSame($baseUrl, $url);
     }
@@ -39,11 +39,15 @@ public function testThumbs()
     {
         $baseUrl = '//img.mapado.net/2014/1/1/my-image';
         $url = $this->manager->buildUrl($baseUrl, 200);
-        $this->assertSame($baseUrl . '_thumbs/200', $url);
+        $this->assertSame($baseUrl . '_thumbs/200-0', $url);
+
+        $baseUrl = '//img.mapado.net/2014/1/1/my-image';
+        $url = $this->manager->buildUrl($baseUrl, 0, 200);
+        $this->assertSame($baseUrl . '_thumbs/0-200', $url);
 
         $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
         $url = $this->manager->buildUrl($baseUrl, 200);
-        $this->assertSame($baseUrl . '_thumbs/200.png', $url);
+        $this->assertSame($baseUrl . '_thumbs/200-0.png', $url);
 
         $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
         $url = $this->manager->buildUrl($baseUrl, 200, 150);
@@ -86,7 +90,7 @@ public function testNoDomain()
     {
         $baseUrl = '2014/1/1/my-image.png';
         $url = $this->manager->buildUrl($baseUrl);
-        $this->assertSame('//img1.mapado.net/' . $baseUrl, $url);
+        $this->assertSame('//img.mapado.net/' . $baseUrl, $url);
 
         $baseUrl = '2014/1/2/my-image.png';
         $url = $this->manager->buildUrl($baseUrl);
@@ -100,7 +104,7 @@ public function testBuildHttpUrl()
             ->withHttpPrefix()
             ->buildUrl($baseUrl);
 
-        $this->assertSame('http://img1.mapado.net/' . $baseUrl, $url);
+        $this->assertSame('http://img.mapado.net/' . $baseUrl, $url);
     }
 
     public function testBuildHttpsUrl()
@@ -110,7 +114,7 @@ public function testBuildHttpsUrl()
             ->withHttpsPrefix()
             ->buildUrl($baseUrl);
 
-        $this->assertSame('https://img1.mapado.net/' . $baseUrl, $url);
+        $this->assertSame('https://img.mapado.net/' . $baseUrl, $url);
     }
 
     public function testBuildHttpDoesNotInterferWithInstance()
@@ -118,6 +122,17 @@ public function testBuildHttpDoesNotInterferWithInstance()
         $baseUrl = '2014/1/1/my-image.png';
         $this->manager->withHttpPrefix();
 
-        $this->assertSame('//img1.mapado.net/' . $baseUrl, $this->manager->buildUrl($baseUrl));
+        $this->assertSame('//img.mapado.net/' . $baseUrl, $this->manager->buildUrl($baseUrl));
+    }
+
+    public function testAllowwebp(): void
+    {
+        $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
+        $url = $this->manager->buildUrl($baseUrl, null, null);
+        $this->assertSame($baseUrl, $url);
+
+        $baseUrl = '//img.mapado.net/2014/1/1/my-image.png';
+        $url = $this->manager->buildUrl($baseUrl, null, null, ['allowwebp' => 1]);
+        $this->assertSame($baseUrl . '_thumbs/0-0.png', $url);
     }
 }
diff --git a/src/Builder.php b/src/Builder.php
index bbfbd2a..d8ac9ab 100644
--- a/src/Builder.php
+++ b/src/Builder.php
@@ -33,14 +33,14 @@ public function withHttpsPrefix(): self
      * generate an image url from its slug
      *
      * @param string $imageSlug the image slug (ie. `/2018/01/foo.jpg`)
-     * @param int $width the output width
-     * @param int $height the output height
+     * @param ?int $width the output width
+     * @param ?int $height the output height
      * @param array<string, string|int> $options accept cropWidth, cropHeight or url options parameters (like `rcr`, etc.)
      */
     public function buildUrl(
         string $imageSlug,
-        int $width = 0,
-        int $height = 0,
+        ?int $width = null,
+        ?int $height = null,
         array $options = []
     ): string {
         $image = trim($imageSlug);
@@ -49,21 +49,18 @@ public function buildUrl(
         }
 
         if (null !== $image && !preg_match('#^//img([1-3])?.mapado.net/#', $image)) {
-            $host = $this->getHost($image);
+            $host = '//img.mapado.net/';
             $image = $host . $image;
         }
 
-        if (null !== $image && $width > 0) {
+        if (null !== $image && (null !== $width || null !== $height || !empty($options))) {
             $extension = pathinfo($image, PATHINFO_EXTENSION);
             $extLen = strlen($extension);
             if ($extLen > 4) {
                 $extension = null;
             }
 
-            $image .= '_thumbs/' . $width;
-            if ($height > 0) {
-                $image .= '-' . $height;
-            }
+            $image .= '_thumbs/' . ($width ?? 0) . '-' . ($height ?? 0);
 
             if (!empty($options['cropWidth']) || !empty($options['cropHeight'])) {
                 $cropWidth = $options['cropWidth'] ?? 0;
@@ -78,9 +75,13 @@ public function buildUrl(
                 $optionValues = [];
                 ksort($options);
                 foreach ($options as $key => $value) {
-                    $optionValues[] = $key . '=' . $value;
+                    if ($key !== 'allowwebp') {
+                        $optionValues[] = $key . '=' . $value;
+                    }
+                }
+                if (!empty($optionValues)) {
+                    $image .= '.' . implode(';', $optionValues);
                 }
-                $image .= '.' . implode(';', $optionValues);
             }
 
             if ($extension) {
@@ -90,19 +91,4 @@ public function buildUrl(
 
         return $this->prefix . $image;
     }
-
-    private function getHost(string $image): string
-    {
-        $matches = [];
-        preg_match('#^[0-9]{4}/[0-9]{1,2}/([0-9]{1,2})#', $image, $matches);
-        if (!empty($matches)) {
-            $shard = (int) $matches[1] % 2;
-            $shard = $shard ?: ''; // remove "0"
-        } else {
-            $shard = '';
-        }
-        $host = '//img' . $shard . '.mapado.net/';
-
-        return $host;
-    }
 }