diff --git a/deps/ada/ada.cpp b/deps/ada/ada.cpp
index 5eb0a3f2ad0b27..1a028b200bc960 100644
--- a/deps/ada/ada.cpp
+++ b/deps/ada/ada.cpp
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-09-05 16:55:45 -0400. Do not edit! */
+/* auto-generated on 2023-09-19 16:48:25 -0400. Do not edit! */
 /* begin file src/ada.cpp */
 #include "ada.h"
 /* begin file src/checkers.cpp */
@@ -11864,7 +11864,7 @@ bool url::set_host_or_hostname(const std::string_view input) {
     }
 
     // Let host be the result of host parsing host_view with url is not special.
-    if (host_view.empty()) {
+    if (host_view.empty() && !is_special()) {
       host = "";
       return true;
     }
@@ -13625,13 +13625,12 @@ bool url_aggregator::set_host_or_hostname(const std::string_view input) {
     // empty string, and either url includes credentials or url's port is
     // non-null, return.
     else if (host_view.empty() &&
-             (is_special() || has_credentials() ||
-              components.port != url_components::omitted)) {
+             (is_special() || has_credentials() || has_port())) {
       return false;
     }
 
     // Let host be the result of host parsing host_view with url is not special.
-    if (host_view.empty()) {
+    if (host_view.empty() && !is_special()) {
       if (has_hostname()) {
         clear_hostname();  // easy!
       } else if (has_dash_dot()) {
diff --git a/deps/ada/ada.h b/deps/ada/ada.h
index 1485e37356bcd5..b3ae3d0aa7635b 100644
--- a/deps/ada/ada.h
+++ b/deps/ada/ada.h
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-09-05 16:55:45 -0400. Do not edit! */
+/* auto-generated on 2023-09-19 16:48:25 -0400. Do not edit! */
 /* begin file include/ada.h */
 /**
  * @file ada.h
@@ -1055,9 +1055,10 @@ inline constexpr bool is_normalized_windows_drive_letter(
   return input.size() >= 2 && (is_alpha(input[0]) && (input[1] == ':'));
 }
 
-ada_really_inline constexpr bool begins_with(std::string_view view,
-                                             std::string_view prefix) {
+ada_really_inline bool begins_with(std::string_view view,
+                                   std::string_view prefix) {
   // in C++20, you have view.begins_with(prefix)
+  // std::equal is constexpr in C++20
   return view.size() >= prefix.size() &&
          std::equal(prefix.begin(), prefix.end(), view.begin());
 }
@@ -5020,10 +5021,10 @@ inline constexpr bool is_normalized_windows_drive_letter(
     std::string_view input) noexcept;
 
 /**
- * @warning Will be removed when Ada supports C++20.
+ * @warning Will be removed when Ada requires C++20.
  */
-ada_really_inline constexpr bool begins_with(std::string_view view,
-                                             std::string_view prefix);
+ada_really_inline bool begins_with(std::string_view view,
+                                   std::string_view prefix);
 
 /**
  * Returns true if an input is an ipv4 address.
@@ -6557,7 +6558,9 @@ inline bool url_aggregator::has_hostname() const noexcept {
 
 inline bool url_aggregator::has_port() const noexcept {
   ada_log("url_aggregator::has_port");
-  return components.pathname_start != components.host_end;
+  // A URL cannot have a username/password/port if its host is null or the empty
+  // string, or its scheme is "file".
+  return has_hostname() && components.pathname_start != components.host_end;
 }
 
 inline bool url_aggregator::has_dash_dot() const noexcept {
@@ -6926,14 +6929,14 @@ inline void url_search_params::sort() {
 #ifndef ADA_ADA_VERSION_H
 #define ADA_ADA_VERSION_H
 
-#define ADA_VERSION "2.6.7"
+#define ADA_VERSION "2.6.8"
 
 namespace ada {
 
 enum {
   ADA_VERSION_MAJOR = 2,
   ADA_VERSION_MINOR = 6,
-  ADA_VERSION_REVISION = 7,
+  ADA_VERSION_REVISION = 8,
 };
 
 }  // namespace ada
diff --git a/doc/contributing/maintaining/maintaining-dependencies.md b/doc/contributing/maintaining/maintaining-dependencies.md
index 874c23d30eb68a..2a752e67d7f019 100644
--- a/doc/contributing/maintaining/maintaining-dependencies.md
+++ b/doc/contributing/maintaining/maintaining-dependencies.md
@@ -9,7 +9,7 @@ All dependencies are located within the `deps` directory.
 This a list of all the dependencies:
 
 * [acorn 8.10.0][]
-* [ada 2.6.7][]
+* [ada 2.6.8][]
 * [base64 0.5.0][]
 * [brotli 1.0.9][]
 * [c-ares 1.19.0][]
@@ -150,7 +150,7 @@ The [acorn](https://github.com/acornjs/acorn) dependency is a JavaScript parser.
 [acorn-walk](https://github.com/acornjs/acorn/tree/master/acorn-walk) is
 an abstract syntax tree walker for the ESTree format.
 
-### ada 2.6.7
+### ada 2.6.8
 
 The [ada](https://github.com/ada-url/ada) dependency is a
 fast and spec-compliant URL parser written in C++.
@@ -319,7 +319,7 @@ it comes from the Chromium team's zlib fork which incorporated
 performance improvements not currently available in standard zlib.
 
 [acorn 8.10.0]: #acorn-8100
-[ada 2.6.7]: #ada-267
+[ada 2.6.8]: #ada-268
 [base64 0.5.0]: #base64-050
 [brotli 1.0.9]: #brotli-109
 [c-ares 1.19.0]: #c-ares-1190