diff --git a/src/Encryptable.php b/src/Encryptable.php
index ea78237..343d19e 100644
--- a/src/Encryptable.php
+++ b/src/Encryptable.php
@@ -40,7 +40,9 @@ public function encryptable($key)
      */
     protected function decryptAttribute($value)
     {
-        $value = decrypt($value);
+        if ($value) {
+            $value = decrypt($value);
+        }
 
         return $value;
     }
@@ -55,7 +57,9 @@ protected function decryptAttribute($value)
      */
     protected function encryptAttribute($value)
     {
-        $value = encrypt($value);
+        if ($value) {
+            $value = encrypt($value);
+        }
 
         return $value;
     }