diff --git a/package-lock.json b/package-lock.json
index 88404c01a18a91..9561b7132e2045 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -55642,6 +55642,7 @@
 				"@wordpress/html-entities": "file:../html-entities",
 				"@wordpress/i18n": "file:../i18n",
 				"@wordpress/icons": "file:../icons",
+				"@wordpress/private-apis": "file:../private-apis",
 				"@wordpress/rich-text": "file:../rich-text",
 				"@wordpress/url": "file:../url"
 			},
@@ -70816,6 +70817,7 @@
 				"@wordpress/html-entities": "file:../html-entities",
 				"@wordpress/i18n": "file:../i18n",
 				"@wordpress/icons": "file:../icons",
+				"@wordpress/private-apis": "file:../private-apis",
 				"@wordpress/rich-text": "file:../rich-text",
 				"@wordpress/url": "file:../url"
 			}
diff --git a/packages/format-library/package.json b/packages/format-library/package.json
index d2ea9062cf79e3..b71addc176e7c1 100644
--- a/packages/format-library/package.json
+++ b/packages/format-library/package.json
@@ -35,6 +35,7 @@
 		"@wordpress/html-entities": "file:../html-entities",
 		"@wordpress/i18n": "file:../i18n",
 		"@wordpress/icons": "file:../icons",
+		"@wordpress/private-apis": "file:../private-apis",
 		"@wordpress/rich-text": "file:../rich-text",
 		"@wordpress/url": "file:../url"
 	},
diff --git a/packages/format-library/src/lock-unlock.js b/packages/format-library/src/lock-unlock.js
new file mode 100644
index 00000000000000..f7512caa4b746f
--- /dev/null
+++ b/packages/format-library/src/lock-unlock.js
@@ -0,0 +1,10 @@
+/**
+ * WordPress dependencies
+ */
+import { __dangerousOptInToUnstableAPIsOnlyForCoreModules } from '@wordpress/private-apis';
+
+export const { lock, unlock } =
+	__dangerousOptInToUnstableAPIsOnlyForCoreModules(
+		'I know using unstable features means my theme or plugin will inevitably break in the next version of WordPress.',
+		'@wordpress/format-library'
+	);
diff --git a/packages/private-apis/src/implementation.js b/packages/private-apis/src/implementation.js
index a7da5bc9726554..619478cf76386d 100644
--- a/packages/private-apis/src/implementation.js
+++ b/packages/private-apis/src/implementation.js
@@ -24,6 +24,7 @@ const CORE_MODULES_USING_PRIVATE_APIS = [
 	'@wordpress/edit-site',
 	'@wordpress/edit-widgets',
 	'@wordpress/editor',
+	'@wordpress/format-library',
 	'@wordpress/patterns',
 	'@wordpress/reusable-blocks',
 	'@wordpress/router',