diff --git a/src/BinaryUtils.php b/src/BinaryUtils.php
index f04a9d9..18ea467 100644
--- a/src/BinaryUtils.php
+++ b/src/BinaryUtils.php
@@ -18,7 +18,6 @@ class BinaryUtils
     {
         // Set the variant to RFC 4122
         $clockSeqHi = $clockSeqHi & 0x3f;
-        $clockSeqHi &= ~(0xc0);
         $clockSeqHi |= 0x80;
 
         return $clockSeqHi;
@@ -35,7 +34,6 @@ class BinaryUtils
     public static function applyVersion($timeHi, $version)
     {
         $timeHi = hexdec($timeHi) & 0x0fff;
-        $timeHi &= ~(0xf000);
         $timeHi |= $version << 12;
 
         return $timeHi;