diff --git a/tests/files/Support/Str.php b/tests/files/Support/Str.php
index 04abd9d..7d4f72e 100644
--- a/tests/files/Support/Str.php
+++ b/tests/files/Support/Str.php
@@ -1125,11 +1125,12 @@ public static function studly($value)
      * @param  string  $string
      * @param  int  $start
      * @param  int|null  $length
+     * @param  string  $encoding
      * @return string
      */
-    public static function substr($string, $start, $length = null)
+    public static function substr($string, $start, $length = null, $encoding = 'UTF-8')
     {
-        return mb_substr($string, $start, $length, 'UTF-8');
+        return mb_substr($string, $start, $length, $encoding);
     }
 
     /**
diff --git a/tests/files/Support/Stringable.php b/tests/files/Support/Stringable.php
index 3a8af52..c211520 100644
--- a/tests/files/Support/Stringable.php
+++ b/tests/files/Support/Stringable.php
@@ -784,11 +784,12 @@ public function studly()
      *
      * @param  int  $start
      * @param  int|null  $length
+     * @param  string  $encoding
      * @return static
      */
-    public function substr($start, $length = null)
+    public function substr($start, $length = null, $encoding = 'UTF-8')
     {
-        return new static(Str::substr($this->value, $start, $length));
+        return new static(Str::substr($this->value, $start, $length, $encoding));
     }
 
     /**
diff --git a/upgrade.sh b/upgrade.sh
index c0650d9..91003bb 100755
--- a/upgrade.sh
+++ b/upgrade.sh
@@ -381,7 +381,7 @@ function getCurrentVersionFromGitHub()
     echo Getting current version from $repository...
 
     if [ -z "$requestedVersion" ]; then
-        collectionVersion=$(git ls-remote $repository --tags  v9.43\* | grep tags/ | grep -v {} | cut -d \/ -f 3 | cut -d v -f 2  | grep -v RC | grep -vi beta | sort -t. -k 1,1n -k 2,2n -k 3,3n| tail -1)
+        collectionVersion=$(git ls-remote $repository --tags  v9.44\* | grep tags/ | grep -v {} | cut -d \/ -f 3 | cut -d v -f 2  | grep -v RC | grep -vi beta | sort -t. -k 1,1n -k 2,2n -k 3,3n| tail -1)
     else
         collectionVersion=$requestedVersion
     fi