diff --git a/classes/external/php/jsmin.php b/classes/external/php/jsmin.php
index dd15f08f..cf4f462e 100644
--- a/classes/external/php/jsmin.php
+++ b/classes/external/php/jsmin.php
@@ -1,4 +1,7 @@
 <?php
+
+//namespace JSMin;
+
 /**
  * JSMin.php - modified PHP implementation of Douglas Crockford's JSMin.
  *
@@ -53,12 +56,7 @@
  * @license http://opensource.org/licenses/mit-license.php MIT License
  * @link http://code.google.com/p/jsmin-php/
  */
-
-// This is from https://github.com/mrclay/jsmin-php 2.3.2
-
 class JSMin {
-    const ORD_LF            = 10;
-    const ORD_SPACE         = 32;
     const ACTION_KEEP_A     = 1;
     const ACTION_DELETE_A   = 2;
     const ACTION_DELETE_A_B = 3;
@@ -123,7 +121,7 @@ public function min()
         while ($this->a !== null) {
             // determine next command
             $command = self::ACTION_KEEP_A; // default
-            if ($this->a === ' ') {
+            if ($this->isWhiteSpace($this->a)) {
                 if (($this->lastByteOut === '+' || $this->lastByteOut === '-')
                         && ($this->b === $this->lastByteOut)) {
                     // Don't delete this space. If we do, the addition/subtraction
@@ -131,8 +129,8 @@ public function min()
                 } elseif (! $this->isAlphaNum($this->b)) {
                     $command = self::ACTION_DELETE_A;
                 }
-            } elseif ($this->a === "\n") {
-                if ($this->b === ' ') {
+            } elseif ($this->isLineTerminator($this->a)) {
+                if ($this->isWhiteSpace($this->b)) {
                     $command = self::ACTION_DELETE_A_B;
 
                     // in case of mbstring.func_overload & 2, must check for null b,
@@ -143,8 +141,8 @@ public function min()
                     $command = self::ACTION_DELETE_A;
                 }
             } elseif (! $this->isAlphaNum($this->a)) {
-                if ($this->b === ' '
-                    || ($this->b === "\n"
+                if ($this->isWhiteSpace($this->b)
+                    || ($this->isLineTerminator($this->b)
                         && (false === strpos('}])+-"\'`', $this->a)))) {
                     $command = self::ACTION_DELETE_A_B;
                 }
@@ -165,7 +163,7 @@ public function min()
      * ACTION_DELETE_A_B = Get the next B.
      *
      * @param int $command
-     * @throws JSMin_UnterminatedRegExpException|JSMin_UnterminatedStringException
+     * @throws JSMin_UnterminatedRegExpException|UnterminatedStringException
      */
     protected function action($command)
     {
@@ -207,7 +205,7 @@ protected function action($command)
                         if ($this->a === $this->b) { // end quote
                             break;
                         }
-                        if ($delimiter === '`' && $this->a === "\n") {
+                        if ($delimiter === '`' && $this->isLineTerminator($this->a)) {
                             // leave the newline
                         } elseif ($this->isEOF($this->a)) {
                             $byte = $this->inputIndex - 1;
@@ -287,7 +285,7 @@ protected function isRegexpLiteral()
 
         // check if first non-ws token is "/" (see starts-regex.js)
         $length = strlen($this->output);
-        if ($this->a === ' ' || $this->a === "\n") {
+        if ($this->isWhiteSpace($this->a) || $this->isLineTerminator($this->a)) {
             if ($length < 2) { // weird edge case
                 return true;
             }
@@ -309,7 +307,7 @@ protected function isRegexpLiteral()
         }
 
         // it's a regexp. Remove unneeded whitespace after keyword
-        if ($this->a === ' ' || $this->a === "\n") {
+        if ($this->isWhiteSpace($this->a) || $this->isLineTerminator($this->a)) {
             $this->a = '';
         }
 
@@ -332,18 +330,13 @@ protected function get()
                 $c = $this->input[$this->inputIndex];
                 $this->inputIndex += 1;
             } else {
-                return $c;
+                $c = null;
             }
         }
-        if ($c === null) {
-            return $c;
-        } else if (ord($c) >= self::ORD_SPACE || $c === "\n") {
-            return $c;
-        }
         if ($c === "\r") {
             return "\n";
         }
-        return ' ';
+        return $c;
     }
 
     /**
@@ -354,7 +347,7 @@ protected function get()
      */
     protected function isEOF($a)
     {
-        return ord($a) <= self::ORD_LF;
+        return $a === null || $this->isLineTerminator($a);
     }
 
     /**
@@ -389,7 +382,7 @@ protected function consumeSingleLineComment()
         while (true) {
             $get = $this->get();
             $comment .= $get;
-            if (ord($get) <= self::ORD_LF) { // end of line reached
+            if ($this->isEOF($get)) {
                 // if IE conditional comment
                 if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
                     $this->keptComment .= "/{$comment}";
@@ -456,6 +449,16 @@ protected function next()
         }
         return $get;
     }
+
+    protected function isWhiteSpace($s) {
+        // https://www.ecma-international.org/ecma-262/#sec-white-space
+        return $s !== null && strpos(" \t\v\f", $s) !== false;
+    }
+
+    protected function isLineTerminator($s) {
+        // https://www.ecma-international.org/ecma-262/#sec-line-terminators
+        return $s !== null && strpos("\n\r", $s) !== false;
+    }
 }
 
 class JSMin_UnterminatedStringException extends Exception {}