@@ -1732,6 +1732,7 @@ def web_scrape_bytes(
         headers: Dict[str, str] | Omit = omit,
         tags: SequenceNotStr[str] | Omit = omit,
         timeout_opts: web_web_scrape_bytes_params.TimeoutOpts | Omit = omit,
+        wait_for_ms: Optional[int] | Omit = omit,
         zdr: Literal["enabled", "disabled"] | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
@@ -1742,10 +1743,12 @@ def web_scrape_bytes(
     ) -> WebWebScrapeBytesResponse:
         """Downloads a resource and returns its bytes as base64.
 
-        Supports images, PDFs,
-        HTML pages, and any other content type without image conversion, text
-        extraction, or character-encoding changes. HTTP compression is decoded before
-        base64 encoding. HTML is the original HTTP response; JavaScript is not rendered.
+        Without waitForMs, returns
+        the original HTTP response without image conversion, text extraction, or
+        character-encoding changes. HTTP compression is decoded before base64 encoding.
+        Supply waitForMs to render HTML with JavaScript in the browser and return the
+        resulting HTML as UTF-8 bytes after the wait. Non-HTML resources, including
+        images and PDFs, keep their original bytes and do not incur a browser wait.
         Follows public redirects and retries failed downloads through ISP and
         residential proxies, with a direct fallback. When country is specified, only a
         residential proxy in that country is used. Supply headers such as Referer for
@@ -1772,6 +1775,13 @@ def web_scrape_bytes(
               timeoutOpts[milliseconds]=30000&timeoutOpts[behavior]=fail or a JSON-encoded
               timeoutOpts object.
 
+          wait_for_ms: Optional browser wait time after initial page load, in milliseconds (0–30000; 0
+              uses 500). When supplied, HTML is rendered with JavaScript and returned as UTF-8
+              bytes. Other resources keep their original bytes without a browser wait. Omit to
+              download the original HTTP response. When combined with timeoutOpts,
+              timeoutOpts.milliseconds must be at least waitForMs + 10000 ms; a shorter
+              deadline is rejected with 400 TIMEOUT_TOO_SHORT_FOR_WAIT.
+
           zdr: Set to enabled to bypass shared caches and omit request and response content
               from retained usage logs. Asset uploads are skipped, so hosted image URLs are
               omitted. Requires zero data retention to be enabled for your organization
@@ -1800,6 +1810,7 @@ def web_scrape_bytes(
                         "headers": headers,
                         "tags": tags,
                         "timeout_opts": timeout_opts,
+                        "wait_for_ms": wait_for_ms,
                         "zdr": zdr,
                     },
                     web_web_scrape_bytes_params.WebWebScrapeBytesParams,
@@ -4743,6 +4754,7 @@ async def web_scrape_bytes(
         headers: Dict[str, str] | Omit = omit,
         tags: SequenceNotStr[str] | Omit = omit,
         timeout_opts: web_web_scrape_bytes_params.TimeoutOpts | Omit = omit,
+        wait_for_ms: Optional[int] | Omit = omit,
         zdr: Literal["enabled", "disabled"] | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
@@ -4753,10 +4765,12 @@ async def web_scrape_bytes(
     ) -> WebWebScrapeBytesResponse:
         """Downloads a resource and returns its bytes as base64.
 
-        Supports images, PDFs,
-        HTML pages, and any other content type without image conversion, text
-        extraction, or character-encoding changes. HTTP compression is decoded before
-        base64 encoding. HTML is the original HTTP response; JavaScript is not rendered.
+        Without waitForMs, returns
+        the original HTTP response without image conversion, text extraction, or
+        character-encoding changes. HTTP compression is decoded before base64 encoding.
+        Supply waitForMs to render HTML with JavaScript in the browser and return the
+        resulting HTML as UTF-8 bytes after the wait. Non-HTML resources, including
+        images and PDFs, keep their original bytes and do not incur a browser wait.
         Follows public redirects and retries failed downloads through ISP and
         residential proxies, with a direct fallback. When country is specified, only a
         residential proxy in that country is used. Supply headers such as Referer for
@@ -4783,6 +4797,13 @@ async def web_scrape_bytes(
               timeoutOpts[milliseconds]=30000&timeoutOpts[behavior]=fail or a JSON-encoded
               timeoutOpts object.
 
+          wait_for_ms: Optional browser wait time after initial page load, in milliseconds (0–30000; 0
+              uses 500). When supplied, HTML is rendered with JavaScript and returned as UTF-8
+              bytes. Other resources keep their original bytes without a browser wait. Omit to
+              download the original HTTP response. When combined with timeoutOpts,
+              timeoutOpts.milliseconds must be at least waitForMs + 10000 ms; a shorter
+              deadline is rejected with 400 TIMEOUT_TOO_SHORT_FOR_WAIT.
+
           zdr: Set to enabled to bypass shared caches and omit request and response content
               from retained usage logs. Asset uploads are skipped, so hosted image URLs are
               omitted. Requires zero data retention to be enabled for your organization
@@ -4811,6 +4832,7 @@ async def web_scrape_bytes(
                         "headers": headers,
                         "tags": tags,
                         "timeout_opts": timeout_opts,
+                        "wait_for_ms": wait_for_ms,
                         "zdr": zdr,
                     },
                     web_web_scrape_bytes_params.WebWebScrapeBytesParams,
 
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import Dict
+from typing import Dict, Optional
 from typing_extensions import Literal, Required, Annotated, TypedDict
 
 from .._types import SequenceNotStr
@@ -248,6 +248,16 @@ class WebWebScrapeBytesParams(TypedDict, total=False):
     or a JSON-encoded timeoutOpts object.
     """
 
+    wait_for_ms: Annotated[Optional[int], PropertyInfo(alias="waitForMs")]
+    """
+    Optional browser wait time after initial page load, in milliseconds (0–30000; 0
+    uses 500). When supplied, HTML is rendered with JavaScript and returned as UTF-8
+    bytes. Other resources keep their original bytes without a browser wait. Omit to
+    download the original HTTP response. When combined with timeoutOpts,
+    timeoutOpts.milliseconds must be at least waitForMs + 10000 ms; a shorter
+    deadline is rejected with 400 TIMEOUT_TOO_SHORT_FOR_WAIT.
+    """
+
     zdr: Literal["enabled", "disabled"]
     """
     Set to enabled to bypass shared caches and omit request and response content
 
@@ -534,6 +534,7 @@ def test_method_web_scrape_bytes_with_all_params(self, client: ContextDev) -> No
                 "milliseconds": 1,
                 "behavior": "fail",
             },
+            wait_for_ms=0,
             zdr="enabled",
         )
         assert_matches_type(WebWebScrapeBytesResponse, web, path=["response"])
@@ -1393,6 +1394,7 @@ async def test_method_web_scrape_bytes_with_all_params(self, async_client: Async
                 "milliseconds": 1,
                 "behavior": "fail",
             },
+            wait_for_ms=0,
             zdr="enabled",
         )
         assert_matches_type(WebWebScrapeBytesResponse, web, path=["response"])