diff --git a/.github/workflows/dart.yml b/.github/workflows/dart.yml
index 2f70d2b..a170201 100644
--- a/.github/workflows/dart.yml
+++ b/.github/workflows/dart.yml
@@ -70,16 +70,16 @@
         if: "always() && steps.pkgs_http_profile_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/http_profile
   job_003:
-    name: "analyze_and_format; linux; Dart 3.2.0; PKGS: pkgs/http, pkgs/http_client_conformance_tests; `dart analyze --fatal-infos`"
+    name: "analyze_and_format; linux; Dart 3.2.0; PKG: pkgs/http_client_conformance_tests; `dart analyze --fatal-infos`"
     runs-on: ubuntu-latest
     steps:
       - name: Cache Pub hosted dependencies
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         with:
           path: "~/.pub-cache/hosted"
-          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http-pkgs/http_client_conformance_tests;commands:analyze_1"
+          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http_client_conformance_tests;commands:analyze_1"
           restore-keys: |
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http-pkgs/http_client_conformance_tests
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http_client_conformance_tests
             os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0
             os:ubuntu-latest;pub-cache-hosted
             os:ubuntu-latest
@@ -90,6 +90,36 @@
       - id: checkout
         name: Checkout repository
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+      - id: pkgs_http_client_conformance_tests_pub_upgrade
+        name: pkgs/http_client_conformance_tests; dart pub upgrade
+        run: dart pub upgrade
+        if: "always() && steps.checkout.conclusion == 'success'"
+        working-directory: pkgs/http_client_conformance_tests
+      - name: "pkgs/http_client_conformance_tests; dart analyze --fatal-infos"
+        run: dart analyze --fatal-infos
+        if: "always() && steps.pkgs_http_client_conformance_tests_pub_upgrade.conclusion == 'success'"
+        working-directory: pkgs/http_client_conformance_tests
+  job_004:
+    name: "analyze_and_format; linux; Dart 3.3.0; PKG: pkgs/http; `dart analyze --fatal-infos`"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cache Pub hosted dependencies
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
+        with:
+          path: "~/.pub-cache/hosted"
+          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http;commands:analyze_1"
+          restore-keys: |
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0
+            os:ubuntu-latest;pub-cache-hosted
+            os:ubuntu-latest
+      - name: Setup Dart SDK
+        uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
+        with:
+          sdk: "3.3.0"
+      - id: checkout
+        name: Checkout repository
+        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
       - id: pkgs_http_pub_upgrade
         name: pkgs/http; dart pub upgrade
         run: dart pub upgrade
@@ -99,16 +129,7 @@
         run: dart analyze --fatal-infos
         if: "always() && steps.pkgs_http_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/http
-      - id: pkgs_http_client_conformance_tests_pub_upgrade
-        name: pkgs/http_client_conformance_tests; dart pub upgrade
-        run: dart pub upgrade
-        if: "always() && steps.checkout.conclusion == 'success'"
-        working-directory: pkgs/http_client_conformance_tests
-      - name: "pkgs/http_client_conformance_tests; dart analyze --fatal-infos"
-        run: dart analyze --fatal-infos
-        if: "always() && steps.pkgs_http_client_conformance_tests_pub_upgrade.conclusion == 'success'"
-        working-directory: pkgs/http_client_conformance_tests
-  job_004:
+  job_005:
     name: "analyze_and_format; linux; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests, pkgs/http_profile; `dart analyze --fatal-infos`"
     runs-on: ubuntu-latest
     steps:
@@ -156,7 +177,7 @@
         run: dart analyze --fatal-infos
         if: "always() && steps.pkgs_http_profile_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/http_profile
-  job_005:
+  job_006:
     name: "analyze_and_format; linux; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests, pkgs/http_profile; `dart format --output=none --set-exit-if-changed .`"
     runs-on: ubuntu-latest
     steps:
@@ -204,7 +225,7 @@
         run: "dart format --output=none --set-exit-if-changed ."
         if: "always() && steps.pkgs_http_profile_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/http_profile
-  job_006:
+  job_007:
     name: "analyze_and_format; linux; Flutter stable; PKG: pkgs/flutter_http_example; `dart format --output=none --set-exit-if-changed .`"
     runs-on: ubuntu-latest
     steps:
@@ -234,7 +255,7 @@
         run: "dart format --output=none --set-exit-if-changed ."
         if: "always() && steps.pkgs_flutter_http_example_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/flutter_http_example
-  job_007:
+  job_008:
     name: "analyze_and_format; linux; Flutter stable; PKG: pkgs/flutter_http_example; `flutter analyze --fatal-infos`"
     runs-on: ubuntu-latest
     steps:
@@ -264,7 +285,7 @@
         run: flutter analyze --fatal-infos
         if: "always() && steps.pkgs_flutter_http_example_pub_upgrade.conclusion == 'success'"
         working-directory: pkgs/flutter_http_example
-  job_008:
+  job_009:
     name: "unit_test; linux; Dart 3.0.0; PKG: pkgs/http_profile; `dart test --platform vm`"
     runs-on: ubuntu-latest
     steps:
@@ -302,24 +323,25 @@
       - job_005
       - job_006
       - job_007
-  job_009:
-    name: "unit_test; linux; Dart 3.2.0; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_default_http_client_test.dart`"
+      - job_008
+  job_010:
+    name: "unit_test; linux; Dart 3.3.0; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_default_http_client_test.dart`"
     runs-on: ubuntu-latest
     steps:
       - name: Cache Pub hosted dependencies
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         with:
           path: "~/.pub-cache/hosted"
-          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http;commands:command_1"
+          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http;commands:command_1"
           restore-keys: |
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0
             os:ubuntu-latest;pub-cache-hosted
             os:ubuntu-latest
       - name: Setup Dart SDK
         uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
-          sdk: "3.2.0"
+          sdk: "3.3.0"
       - id: checkout
         name: Checkout repository
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
@@ -340,24 +362,25 @@
       - job_005
       - job_006
       - job_007
-  job_010:
-    name: "unit_test; linux; Dart 3.2.0; PKG: pkgs/http; `dart test --platform chrome`"
+      - job_008
+  job_011:
+    name: "unit_test; linux; Dart 3.3.0; PKG: pkgs/http; `dart test --platform chrome`"
     runs-on: ubuntu-latest
     steps:
       - name: Cache Pub hosted dependencies
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         with:
           path: "~/.pub-cache/hosted"
-          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http;commands:test_3"
+          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http;commands:test_3"
           restore-keys: |
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0
             os:ubuntu-latest;pub-cache-hosted
             os:ubuntu-latest
       - name: Setup Dart SDK
         uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
-          sdk: "3.2.0"
+          sdk: "3.3.0"
       - id: checkout
         name: Checkout repository
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
@@ -378,24 +401,25 @@
       - job_005
       - job_006
       - job_007
-  job_011:
-    name: "unit_test; linux; Dart 3.2.0; PKG: pkgs/http; `dart test --platform vm`"
+      - job_008
+  job_012:
+    name: "unit_test; linux; Dart 3.3.0; PKG: pkgs/http; `dart test --platform vm`"
     runs-on: ubuntu-latest
     steps:
       - name: Cache Pub hosted dependencies
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         with:
           path: "~/.pub-cache/hosted"
-          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http;commands:test_2"
+          key: "os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http;commands:test_2"
           restore-keys: |
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0;packages:pkgs/http
-            os:ubuntu-latest;pub-cache-hosted;sdk:3.2.0
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0;packages:pkgs/http
+            os:ubuntu-latest;pub-cache-hosted;sdk:3.3.0
             os:ubuntu-latest;pub-cache-hosted
             os:ubuntu-latest
       - name: Setup Dart SDK
         uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
-          sdk: "3.2.0"
+          sdk: "3.3.0"
       - id: checkout
         name: Checkout repository
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
@@ -416,7 +440,8 @@
       - job_005
       - job_006
       - job_007
-  job_012:
+      - job_008
+  job_013:
     name: "unit_test; linux; Dart dev; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_default_http_client_test.dart`"
     runs-on: ubuntu-latest
     steps:
@@ -454,7 +479,8 @@
       - job_005
       - job_006
       - job_007
-  job_013:
+      - job_008
+  job_014:
     name: "unit_test; linux; Dart dev; PKG: pkgs/http; `dart test --platform chrome`"
     runs-on: ubuntu-latest
     steps:
@@ -492,7 +518,8 @@
       - job_005
       - job_006
       - job_007
-  job_014:
+      - job_008
+  job_015:
     name: "unit_test; linux; Dart dev; PKGS: pkgs/http, pkgs/http_profile; `dart test --platform vm`"
     runs-on: ubuntu-latest
     steps:
@@ -539,7 +566,8 @@
       - job_005
       - job_006
       - job_007
-  job_015:
+      - job_008
+  job_016:
     name: "unit_test; linux; Dart dev; PKG: pkgs/http; `dart test --test-randomize-ordering-seed=random -p chrome -c dart2wasm`"
     runs-on: ubuntu-latest
     steps:
@@ -577,7 +605,8 @@
       - job_005
       - job_006
       - job_007
-  job_016:
+      - job_008
+  job_017:
     name: "unit_test; linux; Flutter stable; PKG: pkgs/flutter_http_example; `flutter test --platform chrome`"
     runs-on: ubuntu-latest
     steps:
@@ -615,7 +644,8 @@
       - job_005
       - job_006
       - job_007
-  job_017:
+      - job_008
+  job_018:
     name: "unit_test; linux; Flutter stable; PKG: pkgs/flutter_http_example; `flutter test`"
     runs-on: ubuntu-latest
     steps:
@@ -653,7 +683,8 @@
       - job_005
       - job_006
       - job_007
-  job_018:
+      - job_008
+  job_019:
     name: "unit_test; macos; Flutter stable; PKG: pkgs/flutter_http_example; `flutter test`"
     runs-on: macos-latest
     steps:
@@ -691,7 +722,8 @@
       - job_005
       - job_006
       - job_007
-  job_019:
+      - job_008
+  job_020:
     name: "unit_test; windows; Flutter stable; PKG: pkgs/flutter_http_example; `flutter test`"
     runs-on: windows-latest
     steps:
@@ -719,3 +751,4 @@
       - job_005
       - job_006
       - job_007
+      - job_008
diff --git a/pkgs/http/CHANGELOG.md b/pkgs/http/CHANGELOG.md
index 9421143..86bc678 100644
--- a/pkgs/http/CHANGELOG.md
+++ b/pkgs/http/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.2.1
+
+* Require Dart `^3.3`
+* Require `package:web` `^0.5.0`.
+
 ## 1.2.0
 
 * Add `MockClient.pngResponse`, which makes it easier to fake image responses.
diff --git a/pkgs/http/lib/src/browser_client.dart b/pkgs/http/lib/src/browser_client.dart
index cbbada6..07e2323 100644
--- a/pkgs/http/lib/src/browser_client.dart
+++ b/pkgs/http/lib/src/browser_client.dart
@@ -5,7 +5,7 @@
 import 'dart:async';
 import 'dart:js_interop';
 
-import 'package:web/helpers.dart';
+import 'package:web/web.dart';
 
 import 'base_client.dart';
 import 'base_request.dart';
diff --git a/pkgs/http/pubspec.yaml b/pkgs/http/pubspec.yaml
index a531a63..1874d5c 100644
--- a/pkgs/http/pubspec.yaml
+++ b/pkgs/http/pubspec.yaml
@@ -1,16 +1,16 @@
 name: http
-version: 1.2.0
+version: 1.2.1
 description: A composable, multi-platform, Future-based API for HTTP requests.
 repository: https://github.com/dart-lang/http/tree/master/pkgs/http
 
 environment:
-  sdk: ^3.2.0
+  sdk: ^3.3.0
 
 dependencies:
   async: ^2.5.0
   http_parser: ^4.0.0
   meta: ^1.3.0
-  web: '>=0.3.0 <0.5.0'
+  web: ^0.5.0
 
 dev_dependencies:
   dart_flutter_team_lints: ^2.0.0
diff --git a/pkgs/http/test/html/utils.dart b/pkgs/http/test/html/utils.dart
index 501c621..11170e1 100644
--- a/pkgs/http/test/html/utils.dart
+++ b/pkgs/http/test/html/utils.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:web/helpers.dart';
+import 'package:web/web.dart';
 
 export '../utils.dart';