diff --git a/codepoints.net/lib/Api/Exception.php b/codepoints.net/lib/Api/Exception.php
index 666e9f41..8ebf4ba2 100644
--- a/codepoints.net/lib/Api/Exception.php
+++ b/codepoints.net/lib/Api/Exception.php
@@ -6,14 +6,14 @@
 
 class Exception extends BaseException {
 
-    public const BAD_REQUEST = 400;
-    public const NOT_FOUND = 404;
-    public const METHOD_NOT_ALLOWED = 405;
-    public const PRECONDITION_FAILED = 412;
-    public const REQUEST_ENTITY_TOO_LARGE = 413;
-    public const REQUEST_URI_TOO_LONG = 414;
-    public const INTERNAL_SERVER_ERROR = 500;
-    public const NOT_IMPLEMENTED = 501;
+    public const int BAD_REQUEST = 400;
+    public const int NOT_FOUND = 404;
+    public const int METHOD_NOT_ALLOWED = 405;
+    public const int PRECONDITION_FAILED = 412;
+    public const int REQUEST_ENTITY_TOO_LARGE = 413;
+    public const int REQUEST_URI_TOO_LONG = 414;
+    public const int INTERNAL_SERVER_ERROR = 500;
+    public const int NOT_IMPLEMENTED = 501;
 
     /**
      * @param string $message the error payload
diff --git a/codepoints.net/lib/Router/Pagination.php b/codepoints.net/lib/Router/Pagination.php
index c6bb9945..66f78a35 100644
--- a/codepoints.net/lib/Router/Pagination.php
+++ b/codepoints.net/lib/Router/Pagination.php
@@ -16,7 +16,7 @@ class Pagination {
 
     private int $page = 1;
 
-    public const PAGE_SIZE = 0x100;
+    public const int PAGE_SIZE = 0x100;
 
     private string $urlTemplate;
 
diff --git a/codepoints.net/lib/Translator.php b/codepoints.net/lib/Translator.php
index 15ad8ab8..d6f205c0 100644
--- a/codepoints.net/lib/Translator.php
+++ b/codepoints.net/lib/Translator.php
@@ -11,7 +11,7 @@ class Translator {
 
     private ?string $language = null;
 
-    public const SUPPORTED_LANGUAGES = ['en', 'de', 'es', 'pl'];
+    public const array SUPPORTED_LANGUAGES = ['en', 'de', 'es', 'pl'];
 
     private ?Translations $translations = null;