diff --git a/projects/packages/my-jetpack/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/packages/my-jetpack/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..5b48285659af
--- /dev/null
+++ b/projects/packages/my-jetpack/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Fix the My Jetpack app failing to load on WordPress 6.9 installs without the Gutenberg plugin active, where the wp-theme script handle it depends on is otherwise unregistered.
diff --git a/projects/packages/my-jetpack/composer.json b/projects/packages/my-jetpack/composer.json
index 5a4f41741ba7..418930b8b098 100644
--- a/projects/packages/my-jetpack/composer.json
+++ b/projects/packages/my-jetpack/composer.json
@@ -20,7 +20,8 @@
 		"automattic/jetpack-plans": "@dev",
 		"automattic/jetpack-status": "@dev",
 		"automattic/jetpack-sync": "@dev",
-		"automattic/jetpack-protect-status": "@dev"
+		"automattic/jetpack-protect-status": "@dev",
+		"automattic/jetpack-wp-build-polyfills": "@dev"
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^4.0.0",
diff --git a/projects/packages/my-jetpack/src/class-initializer.php b/projects/packages/my-jetpack/src/class-initializer.php
index d2a56ea71bbd..a7da05fa418f 100644
--- a/projects/packages/my-jetpack/src/class-initializer.php
+++ b/projects/packages/my-jetpack/src/class-initializer.php
@@ -29,6 +29,7 @@
 use Automattic\Jetpack\Sync\Functions as Sync_Functions;
 use Automattic\Jetpack\Terms_Of_Service;
 use Automattic\Jetpack\Tracking;
+use Automattic\Jetpack\WP_Build_Polyfills\WP_Build_Polyfills;
 use Jetpack;
 use WP_Error;
 
@@ -247,12 +248,37 @@ public static function can_use_analytics() {
 		return $tracking->should_enable_tracking( new Terms_Of_Service(), $status );
 	}
 
+	/**
+	 * Register polyfills for the wp-notices / wp-private-apis / wp-theme handles the
+	 * My Jetpack app bundle depends on but WP < 7.0 does not ship (or ships with an
+	 * incomplete allowlist).
+	 *
+	 * @return void
+	 */
+	public static function register_wp_build_polyfills() {
+		if ( ! class_exists( WP_Build_Polyfills::class ) ) {
+			return;
+		}
+
+		WP_Build_Polyfills::register(
+			'my-jetpack',
+			array( 'wp-notices', 'wp-private-apis', 'wp-theme' )
+		);
+	}
+
 	/**
 	 * Enqueue admin page assets.
 	 *
 	 * @return void
 	 */
 	public static function enqueue_scripts() {
+		// Register the wp-build-polyfills shim before the extension hook below or
+		// the app script can enqueue against wp-theme / wp-private-apis / wp-notices.
+		// WP_Build_Polyfills registers synchronously on its first caller, so calling
+		// it after a hook consumer would leave our handles recorded but unregistered
+		// for this request.
+		self::register_wp_build_polyfills();
+
 		/**
 		 * Fires after the My Jetpack page is initialized.
 		 * Allows for enqueuing additional scripts only on the My Jetpack page.
diff --git a/projects/packages/my-jetpack/tests/php/Register_Wp_Build_Polyfills_Test.php b/projects/packages/my-jetpack/tests/php/Register_Wp_Build_Polyfills_Test.php
new file mode 100644
index 000000000000..e75d9ca27d1a
--- /dev/null
+++ b/projects/packages/my-jetpack/tests/php/Register_Wp_Build_Polyfills_Test.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ * Tests for Initializer::register_wp_build_polyfills().
+ *
+ * @package automattic/my-jetpack
+ */
+
+namespace Automattic\Jetpack\My_Jetpack;
+
+use Automattic\Jetpack\WP_Build_Polyfills\WP_Build_Polyfills;
+use PHPUnit\Framework\TestCase;
+use ReflectionProperty;
+
+/**
+ * Verifies My Jetpack requests the wp-build-polyfills shim for the script handles
+ * its app bundle depends on but older WordPress (< 7.0, no Gutenberg) does not ship.
+ *
+ * @see \Automattic\Jetpack\My_Jetpack\Initializer::register_wp_build_polyfills
+ */
+class Register_Wp_Build_Polyfills_Test extends TestCase {
+
+	/**
+	 * The app bundle's polyfill-provided handles that must be requested.
+	 */
+	const EXPECTED_HANDLES = array( 'wp-notices', 'wp-private-apis', 'wp-theme' );
+
+	/**
+	 * Reset the WP_Build_Polyfills static registrar so tests do not inherit state.
+	 */
+	public function tearDown(): void {
+		foreach ( array(
+			'requested'            => array(),
+			'hooked'               => false,
+			'wp_version_threshold' => '7.0',
+		) as $name => $value ) {
+			$prop = new ReflectionProperty( WP_Build_Polyfills::class, $name );
+			if ( PHP_VERSION_ID < 80100 ) {
+				$prop->setAccessible( true );
+			}
+			$prop->setValue( null, $value );
+		}
+		parent::tearDown();
+	}
+
+	/**
+	 * Registering requests each required handle for the `my-jetpack` consumer.
+	 */
+	public function test_registers_required_polyfill_handles() {
+		Initializer::register_wp_build_polyfills();
+
+		$consumers = WP_Build_Polyfills::get_consumers();
+
+		foreach ( self::EXPECTED_HANDLES as $handle ) {
+			$this->assertArrayHasKey( $handle, $consumers, "$handle should be requested" );
+			$this->assertContains( 'my-jetpack', $consumers[ $handle ], "$handle should list the my-jetpack consumer" );
+		}
+	}
+}
diff --git a/projects/plugins/backup/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/backup/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/backup/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/backup/composer.lock b/projects/plugins/backup/composer.lock
index 96f271205871..dff81a6e3a18 100644
--- a/projects/plugins/backup/composer.lock
+++ b/projects/plugins/backup/composer.lock
@@ -1325,7 +1325,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1344,6 +1344,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
diff --git a/projects/plugins/boost/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/boost/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..0b3918424ee4
--- /dev/null
+++ b/projects/plugins/boost/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Fix a blank Boost admin page on WordPress 6.9 installs without the Gutenberg plugin active, where the wp-theme script handle the embedded My Jetpack app depends on was otherwise unregistered.
diff --git a/projects/plugins/boost/composer.lock b/projects/plugins/boost/composer.lock
index 2d95eba9da69..4937c9f3de4c 100644
--- a/projects/plugins/boost/composer.lock
+++ b/projects/plugins/boost/composer.lock
@@ -1242,7 +1242,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1261,6 +1261,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
@@ -2085,6 +2086,72 @@
                 "relative": true
             }
         },
+        {
+            "name": "automattic/jetpack-wp-build-polyfills",
+            "version": "dev-trunk",
+            "dist": {
+                "type": "path",
+                "url": "../../packages/wp-build-polyfills",
+                "reference": "116ceba3c357f49d40854f3083f60faa372f5c25"
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "automattic/jetpack-test-environment": "@dev",
+                "automattic/phpunit-select-config": "@dev",
+                "yoast/phpunit-polyfills": "^4.0.0"
+            },
+            "type": "jetpack-library",
+            "extra": {
+                "autotagger": true,
+                "mirror-repo": "Automattic/jetpack-wp-build-polyfills",
+                "textdomain": "jetpack-wp-build-polyfills",
+                "changelogger": {
+                    "link-template": "https://github.com/Automattic/jetpack-wp-build-polyfills/compare/v${old}...v${new}"
+                },
+                "branch-alias": {
+                    "dev-trunk": "0.2.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "scripts": {
+                "build-production": [
+                    "pnpm run build-production"
+                ],
+                "build-development": [
+                    "pnpm run build"
+                ],
+                "phpunit": [
+                    "phpunit-select-config phpunit.#.xml.dist --colors=always"
+                ],
+                "test-php": [
+                    "@composer phpunit"
+                ],
+                "test-php-coverage": [
+                    "php -dpcov.directory=. ./vendor/bin/phpunit-select-config phpunit.#.xml.dist --coverage-php \"$COVERAGE_DIR/php.cov\""
+                ],
+                "test-js": [
+                    "pnpm run build",
+                    "pnpm run test"
+                ],
+                "test-js-coverage": [
+                    "pnpm run build",
+                    "pnpm run test-coverage"
+                ]
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "Polyfills for WordPress Core packages not available or incomplete in older WP versions",
+            "transport-options": {
+                "relative": true
+            }
+        },
         {
             "name": "automattic/jetpack-wp-js-data-sync",
             "version": "dev-trunk",
diff --git a/projects/plugins/jetpack/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/jetpack/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..e93330c1de2e
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: other
+Comment: Update composer.lock.
diff --git a/projects/plugins/jetpack/composer.lock b/projects/plugins/jetpack/composer.lock
index da2952137eb4..807a5320bf7c 100644
--- a/projects/plugins/jetpack/composer.lock
+++ b/projects/plugins/jetpack/composer.lock
@@ -2303,7 +2303,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -2322,6 +2322,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
diff --git a/projects/plugins/protect/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/protect/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/protect/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/protect/composer.lock b/projects/plugins/protect/composer.lock
index a41fc1c84f53..7e65e472e4b0 100644
--- a/projects/plugins/protect/composer.lock
+++ b/projects/plugins/protect/composer.lock
@@ -1304,7 +1304,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1323,6 +1323,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
@@ -2101,6 +2102,72 @@
                 "relative": true
             }
         },
+        {
+            "name": "automattic/jetpack-wp-build-polyfills",
+            "version": "dev-trunk",
+            "dist": {
+                "type": "path",
+                "url": "../../packages/wp-build-polyfills",
+                "reference": "116ceba3c357f49d40854f3083f60faa372f5c25"
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "automattic/jetpack-test-environment": "@dev",
+                "automattic/phpunit-select-config": "@dev",
+                "yoast/phpunit-polyfills": "^4.0.0"
+            },
+            "type": "jetpack-library",
+            "extra": {
+                "autotagger": true,
+                "mirror-repo": "Automattic/jetpack-wp-build-polyfills",
+                "textdomain": "jetpack-wp-build-polyfills",
+                "changelogger": {
+                    "link-template": "https://github.com/Automattic/jetpack-wp-build-polyfills/compare/v${old}...v${new}"
+                },
+                "branch-alias": {
+                    "dev-trunk": "0.2.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "scripts": {
+                "build-production": [
+                    "pnpm run build-production"
+                ],
+                "build-development": [
+                    "pnpm run build"
+                ],
+                "phpunit": [
+                    "phpunit-select-config phpunit.#.xml.dist --colors=always"
+                ],
+                "test-php": [
+                    "@composer phpunit"
+                ],
+                "test-php-coverage": [
+                    "php -dpcov.directory=. ./vendor/bin/phpunit-select-config phpunit.#.xml.dist --coverage-php \"$COVERAGE_DIR/php.cov\""
+                ],
+                "test-js": [
+                    "pnpm run build",
+                    "pnpm run test"
+                ],
+                "test-js-coverage": [
+                    "pnpm run build",
+                    "pnpm run test-coverage"
+                ]
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "Polyfills for WordPress Core packages not available or incomplete in older WP versions",
+            "transport-options": {
+                "relative": true
+            }
+        },
         {
             "name": "wikimedia/aho-corasick",
             "version": "v1.0.1",
diff --git a/projects/plugins/search/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/search/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/search/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/search/composer.lock b/projects/plugins/search/composer.lock
index 245c91c29e91..15febd96abb5 100644
--- a/projects/plugins/search/composer.lock
+++ b/projects/plugins/search/composer.lock
@@ -1182,7 +1182,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1201,6 +1201,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
@@ -2044,6 +2045,72 @@
             "transport-options": {
                 "relative": true
             }
+        },
+        {
+            "name": "automattic/jetpack-wp-build-polyfills",
+            "version": "dev-trunk",
+            "dist": {
+                "type": "path",
+                "url": "../../packages/wp-build-polyfills",
+                "reference": "116ceba3c357f49d40854f3083f60faa372f5c25"
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "automattic/jetpack-test-environment": "@dev",
+                "automattic/phpunit-select-config": "@dev",
+                "yoast/phpunit-polyfills": "^4.0.0"
+            },
+            "type": "jetpack-library",
+            "extra": {
+                "autotagger": true,
+                "mirror-repo": "Automattic/jetpack-wp-build-polyfills",
+                "textdomain": "jetpack-wp-build-polyfills",
+                "changelogger": {
+                    "link-template": "https://github.com/Automattic/jetpack-wp-build-polyfills/compare/v${old}...v${new}"
+                },
+                "branch-alias": {
+                    "dev-trunk": "0.2.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "scripts": {
+                "build-production": [
+                    "pnpm run build-production"
+                ],
+                "build-development": [
+                    "pnpm run build"
+                ],
+                "phpunit": [
+                    "phpunit-select-config phpunit.#.xml.dist --colors=always"
+                ],
+                "test-php": [
+                    "@composer phpunit"
+                ],
+                "test-php-coverage": [
+                    "php -dpcov.directory=. ./vendor/bin/phpunit-select-config phpunit.#.xml.dist --coverage-php \"$COVERAGE_DIR/php.cov\""
+                ],
+                "test-js": [
+                    "pnpm run build",
+                    "pnpm run test"
+                ],
+                "test-js-coverage": [
+                    "pnpm run build",
+                    "pnpm run test-coverage"
+                ]
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "Polyfills for WordPress Core packages not available or incomplete in older WP versions",
+            "transport-options": {
+                "relative": true
+            }
         }
     ],
     "packages-dev": [
diff --git a/projects/plugins/social/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/social/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/social/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/social/composer.lock b/projects/plugins/social/composer.lock
index c34ce7d9fa98..6d4fe580ef05 100644
--- a/projects/plugins/social/composer.lock
+++ b/projects/plugins/social/composer.lock
@@ -1305,7 +1305,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1324,6 +1324,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
diff --git a/projects/plugins/starter-plugin/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/starter-plugin/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/starter-plugin/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/starter-plugin/composer.lock b/projects/plugins/starter-plugin/composer.lock
index 4b764a2f441a..3ee42cac44c8 100644
--- a/projects/plugins/starter-plugin/composer.lock
+++ b/projects/plugins/starter-plugin/composer.lock
@@ -1182,7 +1182,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1201,6 +1201,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {
@@ -1834,6 +1835,72 @@
             "transport-options": {
                 "relative": true
             }
+        },
+        {
+            "name": "automattic/jetpack-wp-build-polyfills",
+            "version": "dev-trunk",
+            "dist": {
+                "type": "path",
+                "url": "../../packages/wp-build-polyfills",
+                "reference": "116ceba3c357f49d40854f3083f60faa372f5c25"
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "automattic/jetpack-test-environment": "@dev",
+                "automattic/phpunit-select-config": "@dev",
+                "yoast/phpunit-polyfills": "^4.0.0"
+            },
+            "type": "jetpack-library",
+            "extra": {
+                "autotagger": true,
+                "mirror-repo": "Automattic/jetpack-wp-build-polyfills",
+                "textdomain": "jetpack-wp-build-polyfills",
+                "changelogger": {
+                    "link-template": "https://github.com/Automattic/jetpack-wp-build-polyfills/compare/v${old}...v${new}"
+                },
+                "branch-alias": {
+                    "dev-trunk": "0.2.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "scripts": {
+                "build-production": [
+                    "pnpm run build-production"
+                ],
+                "build-development": [
+                    "pnpm run build"
+                ],
+                "phpunit": [
+                    "phpunit-select-config phpunit.#.xml.dist --colors=always"
+                ],
+                "test-php": [
+                    "@composer phpunit"
+                ],
+                "test-php-coverage": [
+                    "php -dpcov.directory=. ./vendor/bin/phpunit-select-config phpunit.#.xml.dist --coverage-php \"$COVERAGE_DIR/php.cov\""
+                ],
+                "test-js": [
+                    "pnpm run build",
+                    "pnpm run test"
+                ],
+                "test-js-coverage": [
+                    "pnpm run build",
+                    "pnpm run test-coverage"
+                ]
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "Polyfills for WordPress Core packages not available or incomplete in older WP versions",
+            "transport-options": {
+                "relative": true
+            }
         }
     ],
     "packages-dev": [
diff --git a/projects/plugins/videopress/changelog/fix-my-jetpack-wp-theme-polyfill b/projects/plugins/videopress/changelog/fix-my-jetpack-wp-theme-polyfill
new file mode 100644
index 000000000000..ee676e918376
--- /dev/null
+++ b/projects/plugins/videopress/changelog/fix-my-jetpack-wp-theme-polyfill
@@ -0,0 +1,3 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
diff --git a/projects/plugins/videopress/composer.lock b/projects/plugins/videopress/composer.lock
index 2c2d124d7304..91a882306dc2 100644
--- a/projects/plugins/videopress/composer.lock
+++ b/projects/plugins/videopress/composer.lock
@@ -1182,7 +1182,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/my-jetpack",
-                "reference": "d7e68e4abc1bfdb3cf59f52a5e181e21f886db65"
+                "reference": "c1600e21082d85771a93662fb7dd4f610785edf1"
             },
             "require": {
                 "automattic/jetpack-admin-ui": "@dev",
@@ -1201,6 +1201,7 @@
                 "automattic/jetpack-redirect": "@dev",
                 "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-sync": "@dev",
+                "automattic/jetpack-wp-build-polyfills": "@dev",
                 "php": ">=7.2"
             },
             "require-dev": {