diff --git a/Utils/Encoding/Caesar.php b/Utils/Encoding/Caesar.php
index ee2e89e2a..9851d4d5b 100644
--- a/Utils/Encoding/Caesar.php
+++ b/Utils/Encoding/Caesar.php
@@ -56,7 +56,7 @@ class Caesar
         $length    = \strlen($source);
         $keyLength = \strlen($key) - 1;
 
-        for ($i = 0, $j = 0; $i < $length; ++$i, $j++) {
+        for ($i = 0, $j = 0; $i < $length; ++$i, ++$j) {
             if ($j > $keyLength) {
                 $j = 0;
             }
@@ -89,7 +89,7 @@ class Caesar
         $length    = \strlen($raw);
         $keyLength = \strlen($key) - 1;
 
-        for ($i = 0, $j = 0; $i < $length; ++$i, $j++) {
+        for ($i = 0, $j = 0; $i < $length; ++$i, ++$j) {
             if ($j > $keyLength) {
                 $j = 0;
             }