diff --git a/README.md b/README.md
index e763d07..5e08f93 100644
--- a/README.md
+++ b/README.md
@@ -419,8 +419,9 @@ $navigation->waitForNavigation();
 
 // take a screenshot
 $screenshot = $page->screenshot([
-    'format'  => 'jpeg',  // default to 'png' - possible values: 'png', 'jpeg',
-    'quality' => 80,      // only if format is 'jpeg' - default 100
+    'format'  => 'jpeg',  // default to 'png' - possible values: 'png', 'jpeg', 'webp'
+    'quality' => 80,      // only when format is 'jpeg' or 'webp' - default 100
+    'optimizeForSpeed' => true // default to 'false' - Optimize image encoding for speed, not for resulting size
 ]);
 
 // save the screenshot
@@ -470,7 +471,7 @@ $navigation->waitForNavigation();
 $screenshot = $page->screenshot([
     'captureBeyondViewport' => true,
     'clip' => $page->getFullPageClip(),
-    'format' => 'jpeg', // default to 'png' - possible values: 'png', 'jpeg',
+    'format' => 'jpeg', // default to 'png' - possible values: 'png', 'jpeg', 'webp'
 ]);
 
 // save the screenshot
diff --git a/src/Page.php b/src/Page.php
index 82ce911..0ee6659 100644
--- a/src/Page.php
+++ b/src/Page.php
@@ -589,7 +589,8 @@ public function getFullPageClip(int $timeout = null): Clip
      * $screenshot = $page->screenshot([
      *     'captureBeyondViewport' => true,
      *     'clip' => $page->getFullPageClip(),
-     *     'format' => 'jpeg', // default to 'png' - possible values: 'png', 'jpeg',
+     *     'format' => 'jpeg', // default to 'png' - possible values: 'png', 'jpeg', 'webp'
+     *     'optimizeForSpeed' => true, // default to false - Optimize image encoding for speed, not for resulting size
      * ]);
      *
      * // save the screenshot
@@ -624,15 +625,15 @@ public function screenshot(array $options = []): PageScreenshot
         }
 
         // make sure format is valid
-        if (!\in_array($screenshotOptions['format'], ['png', 'jpeg'])) {
-            throw new \InvalidArgumentException('Invalid options "format" for page screenshot. Format must be "png" or "jpeg".');
+        if (!\in_array($screenshotOptions['format'], ['png', 'jpeg', 'webp'])) {
+            throw new \InvalidArgumentException('Invalid options "format" for page screenshot. Format must be "png", "jpeg" or "webp".');
         }
 
         // get quality
         if (\array_key_exists('quality', $options)) {
-            // quality requires type to be jpeg
-            if ('jpeg' !== $screenshotOptions['format']) {
-                throw new \InvalidArgumentException('Invalid options "quality" for page screenshot. Quality requires the image format to be "jpeg".');
+            // quality requires type to be jpeg or webp
+            if (!\in_array($screenshotOptions['format'], ['jpeg', 'webp'])) {
+                throw new \InvalidArgumentException('Invalid options "quality" for page screenshot. Quality requires the image format to be "jpeg" or "webp".');
             }
 
             // quality must be an integer
@@ -666,6 +667,15 @@ public function screenshot(array $options = []): PageScreenshot
             ];
         }
 
+        // optimize for speed
+        if (\array_key_exists('optimizeForSpeed', $options)) {
+            if (!\is_bool($options['optimizeForSpeed'])) {
+                throw new \InvalidArgumentException('Invalid options "optimizeForSpeed" for page screenshot. OptimizeForSpeed must be a boolean value.');
+            }
+
+            $screenshotOptions['optimizeForSpeed'] = $options['optimizeForSpeed'];
+        }
+
         // request screenshot
         $responseReader = $this->getSession()
             ->sendMessage(new Message('Page.captureScreenshot', $screenshotOptions));