diff --git a/src/Time/Date.php b/src/Time/Date.php
index 1f97fafe..ee3b62e6 100644
--- a/src/Time/Date.php
+++ b/src/Time/Date.php
@@ -34,6 +34,7 @@
 use function gregoriantojd;
 use function intval;
 use function is_int;
+use function is_string;
 use function jdtogregorian;
 use function sprintf;
 use function str_replace;
diff --git a/src/common/Str.php b/src/common/Str.php
index 09c459d4..682017a5 100644
--- a/src/common/Str.php
+++ b/src/common/Str.php
@@ -61,7 +61,7 @@ class Str
 
     public static function checkEncoding(string $string): bool
     {
-        return $string === self::fixEncoding($string);
+        return $string === Strings::fixEncoding($string);
     }
 
     public static function fixEncoding(string $string): string
@@ -569,7 +569,7 @@ public static function match(string $string, string $pattern, int $flags = 0, in
 
     /**
      * @deprecated use Re::matchAll() instead
-     * @return string[]
+     * @return string[][]
      */
     public static function matchAll(string $string, string $pattern, int $flags = 0, int $offset = 0): array
     {