diff --git a/composer.json b/composer.json
index 14db1f5cf..e5c33b6bd 100644
--- a/composer.json
+++ b/composer.json
@@ -44,9 +44,10 @@
     "ext-libsodium": "Required to use the AttributeEncryptedString.",
     "ext-openssl": "Can be used as a polyfill if libsodium is not installed",
     "ext-mcrypt": "Can be used as a polyfill if either libsodium and openssl are not installed (libsodium and openssl are more secure)",
+    "ext-apcu": "For better performance and stability",
+    "ext-imap": "Required by the extension \"Mail to ticket automation\""
     "ext-ldap": "Required to use LDAP as an identity provider",
     "ext-posix": "Not required by the core, but some extensions uses it.",
-    "ext-imap": "Required by the extension \"Mail to ticket automation\""
   },
   "config": {
     "platform": {
diff --git a/setup/setuputils.class.inc.php b/setup/setuputils.class.inc.php
index 59d28e428..eb2089255 100644
--- a/setup/setuputils.class.inc.php
+++ b/setup/setuputils.class.inc.php
@@ -2169,6 +2169,7 @@ JS
 				'sodium' => 'Strong encryption will not be used.',
 				'openssl' => 'Strong encryption will not be used.',
 			],
+			'apcu' => 'Performances will be slightly degraded.',
 			'ldap' => 'LDAP authentication will be disabled.',
 		];