diff --git a/src/Filter/Range.php b/src/Filter/Range.php
index af23dd96953a2d5d99a22dbeb0d1d7a3f81ce9b3..e5702a7e9e58e6986d1bf815679ab47d0b5e4b5c 100644
--- a/src/Filter/Range.php
+++ b/src/Filter/Range.php
@@ -13,13 +13,14 @@ final class Range extends HttpFilter
     /** @throws FilterParameterValueIsNullException */
     public function addToQuery(QueryBuilder $queryBuilder): QueryBuilder
     {
-        if (! isset($this->getHttpValue()['min']) && ! isset($this->getHttpValue()['max'])) {
+        if ((! isset($this->getHttpValue()['min']) && ! isset($this->getHttpValue()['max']))
+            || (! is_numeric($this->getHttpValue()['min']) && ! is_numeric($this->getHttpValue()['max']))) {
             throw new FilterParameterValueIsNullException($this->field);
         }
 
         if (isset($this->getHttpValue()['min'])) {
             $queryBuilder->where(
-                $this->getColumn() . '>= ' . $this->getHttpValue()['min']
+                $this->getColumn() . ' >= ' . $this->getHttpValue()['min']
             );
         }