diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e182b27..0de83758 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## 2.3.1 under development
 
 - Enh #226: Check empty string as key in command map in `CommandLoader` validation (@vjik)
+- Bug #224: Fix typo in `UNAVAILABLE` exit code reason (@vjik)
 
 ## 2.3.0 January 23, 2025
 
diff --git a/src/ExitCode.php b/src/ExitCode.php
index 2aa6b3e8..e0589093 100644
--- a/src/ExitCode.php
+++ b/src/ExitCode.php
@@ -177,7 +177,7 @@ class ExitCode
         self::NOINPUT => 'Input file not found or unreadable',
         self::NOUSER => 'User not found',
         self::NOHOST => 'Host not found',
-        self::UNAVAILABLE => 'A requied service is unavailable',
+        self::UNAVAILABLE => 'A required service is unavailable',
         self::SOFTWARE => 'Internal error',
         self::OSERR => 'Error making system call or using OS service',
         self::OSFILE => 'Error accessing system file',
diff --git a/tests/ExitCodeTest.php b/tests/ExitCodeTest.php
index d899ac29..b5d9433a 100644
--- a/tests/ExitCodeTest.php
+++ b/tests/ExitCodeTest.php
@@ -18,7 +18,7 @@ public function reasons(): array
             ['Input file not found or unreadable', ExitCode::NOINPUT],
             ['User not found', ExitCode::NOUSER],
             ['Host not found', ExitCode::NOHOST],
-            ['A requied service is unavailable', ExitCode::UNAVAILABLE],
+            ['A required service is unavailable', ExitCode::UNAVAILABLE],
             ['Internal error', ExitCode::SOFTWARE],
             ['Error making system call or using OS service', ExitCode::OSERR],
             ['Error accessing system file', ExitCode::OSFILE],