diff --git a/composer.json b/composer.json
index 1eb83c14..1b284c75 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "description": "Migration Tool",
     "version": "2.4.5",
     "require": {
-        "symfony/console": "~4.4.0",
+        "symfony/console": "^5.4",
         "magento/framework": "*",
         "monolog/monolog": "^2.3"
     },
diff --git a/src/Migration/Handler/SetValue.php b/src/Migration/Handler/SetValue.php
index c1aad874..992b6ff1 100644
--- a/src/Migration/Handler/SetValue.php
+++ b/src/Migration/Handler/SetValue.php
@@ -32,17 +32,20 @@ public function handle(Record $recordToHandle, Record $oppositeRecord)
     {
         $this->validate($recordToHandle);
         $valueStored = $recordToHandle->getValue($this->field);
-        $operator = substr($this->value, 0, 1);
-        $value = substr($this->value, 1);
-        switch ($operator) {
-            case '+':
-                $value = $valueStored + $value;
-                break;
-            case '-';
-                $value = $valueStored - $value;
-                break;
-            default:
-                $value = $this->value;
+        $value = $this->value;
+        if (is_string($value)) {
+            $operator = substr($value, 0, 1);
+            $value = substr($value, 1);
+            switch ($operator) {
+                case '+':
+                    $value = $valueStored + $value;
+                    break;
+                case '-';
+                    $value = $valueStored - $value;
+                    break;
+                default:
+                    $value = $this->value;
+            }
         }
         $recordToHandle->setValue($this->field, $value);
     }