diff --git a/src/HebrewDate.php b/src/HebrewDate.php
index 212c009..bf40d35 100644
--- a/src/HebrewDate.php
+++ b/src/HebrewDate.php
@@ -43,6 +43,10 @@ public function addHebrewYears(int $year = 1): self
     {
         $this->jewishYear += $year;
 
+        if($this->jewishMonth == 6 && ! $this->isJewishLeapYear()) {
+            $this->jewishMonth++;
+        }
+
         return self::createFromJewishDate($this->jewishYear, $this->jewishMonth, $this->jewishDay);
     }
 
@@ -50,6 +54,10 @@ public function subHebrewYears(int $year = 1): self
     {
         $this->jewishYear -= $year;
 
+        if($this->jewishMonth == 6 && ! $this->isJewishLeapYear()) {
+            $this->jewishMonth++;
+        }
+
         return self::createFromJewishDate($this->jewishYear, $this->jewishMonth, $this->jewishDay);
     }