diff --git a/src/Expression/NumericExpression.php b/src/Expression/NumericExpression.php
index ebbd00a..39474e0 100644
--- a/src/Expression/NumericExpression.php
+++ b/src/Expression/NumericExpression.php
@@ -7,7 +7,7 @@ public function getValue()
   {
     if(stristr($this->_value, '.'))
     {
-      return filter_var(
+      return (float)filter_var(
         $this->_value,
         FILTER_SANITIZE_NUMBER_FLOAT,
         FILTER_FLAG_ALLOW_FRACTION