diff --git a/deps/ada/ada.cpp b/deps/ada/ada.cpp
index 1a028b200bc960..0cd21f21090bc6 100644
--- a/deps/ada/ada.cpp
+++ b/deps/ada/ada.cpp
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-09-19 16:48:25 -0400. Do not edit! */
+/* auto-generated on 2023-09-29 13:28:16 -0400. Do not edit! */
 /* begin file src/ada.cpp */
 #include "ada.h"
 /* begin file src/checkers.cpp */
@@ -116,7 +116,7 @@ ada_really_inline constexpr bool verify_dns_length(
 
 ADA_PUSH_DISABLE_ALL_WARNINGS
 /* begin file src/ada_idna.cpp */
-/* auto-generated on 2023-08-29 15:28:19 -0400. Do not edit! */
+/* auto-generated on 2023-09-19 15:58:51 -0400. Do not edit! */
 /* begin file src/idna.cpp */
 /* begin file src/unicode_transcoding.cpp */
 
@@ -9505,18 +9505,19 @@ bool is_label_valid(const std::u32string_view label) {
 
 namespace ada::idna {
 
-bool constexpr begins_with(std::u32string_view view,
-                           std::u32string_view prefix) {
+bool begins_with(std::u32string_view view, std::u32string_view prefix) {
   if (view.size() < prefix.size()) {
     return false;
   }
+  // constexpr as of C++20
   return std::equal(prefix.begin(), prefix.end(), view.begin());
 }
 
-bool constexpr begins_with(std::string_view view, std::string_view prefix) {
+bool begins_with(std::string_view view, std::string_view prefix) {
   if (view.size() < prefix.size()) {
     return false;
   }
+  // constexpr as of C++20
   return std::equal(prefix.begin(), prefix.end(), view.begin());
 }
 
diff --git a/deps/ada/ada.h b/deps/ada/ada.h
index b3ae3d0aa7635b..da75a5d985b6cd 100644
--- a/deps/ada/ada.h
+++ b/deps/ada/ada.h
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-09-19 16:48:25 -0400. Do not edit! */
+/* auto-generated on 2023-09-29 13:28:16 -0400. Do not edit! */
 /* begin file include/ada.h */
 /**
  * @file ada.h
@@ -8,7 +8,7 @@
 #define ADA_H
 
 /* begin file include/ada/ada_idna.h */
-/* auto-generated on 2023-08-29 15:28:19 -0400. Do not edit! */
+/* auto-generated on 2023-09-19 15:58:51 -0400. Do not edit! */
 /* begin file include/idna.h */
 #ifndef ADA_IDNA_H
 #define ADA_IDNA_H
@@ -129,9 +129,8 @@ std::string to_ascii(std::string_view ut8_string);
 // https://url.spec.whatwg.org/#forbidden-domain-code-point
 bool contains_forbidden_domain_code_point(std::string_view ascii_string);
 
-bool constexpr begins_with(std::u32string_view view,
-                           std::u32string_view prefix);
-bool constexpr begins_with(std::string_view view, std::string_view prefix);
+bool begins_with(std::u32string_view view, std::u32string_view prefix);
+bool begins_with(std::string_view view, std::string_view prefix);
 
 bool constexpr is_ascii(std::u32string_view view);
 bool constexpr is_ascii(std::string_view view);
@@ -6929,14 +6928,14 @@ inline void url_search_params::sort() {
 #ifndef ADA_ADA_VERSION_H
 #define ADA_ADA_VERSION_H
 
-#define ADA_VERSION "2.6.8"
+#define ADA_VERSION "2.6.9"
 
 namespace ada {
 
 enum {
   ADA_VERSION_MAJOR = 2,
   ADA_VERSION_MINOR = 6,
-  ADA_VERSION_REVISION = 8,
+  ADA_VERSION_REVISION = 9,
 };
 
 }  // namespace ada
diff --git a/doc/contributing/maintaining/maintaining-dependencies.md b/doc/contributing/maintaining/maintaining-dependencies.md
index b6c9d732da3a29..92c6cb06fb1f6e 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 2.6.8][]
+* [ada 2.6.9][]
 * [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 2.6.8
+### ada 2.6.9
 
 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 2.6.8]: #ada-268
+[ada 2.6.9]: #ada-269
 [base64 0.5.0]: #base64-050
 [brotli 1.0.9]: #brotli-109
 [c-ares 1.19.0]: #c-ares-1190