diff --git a/src/Logic/Resolvers/FilterResolver.php b/src/Logic/Resolvers/FilterResolver.php
index 55b4552..7fe52f2 100644
--- a/src/Logic/Resolvers/FilterResolver.php
+++ b/src/Logic/Resolvers/FilterResolver.php
@@ -44,7 +44,7 @@ public function setFilters(FilterUI|array $filters): self
     public function apply(Builder $query): Builder
     {
         foreach ($this->filters as $filter) {
-            $fields = $filter->fields();
+            $fields = app($filter)->fields();
             $this->handleFields($query, $fields);
 
         }
@@ -89,7 +89,7 @@ public function render(): array
     {
         $resultFields = [];
         foreach ($this->filters as $filter) {
-            $fields = $filter->fields();
+            $fields = app($filter)->fields();
             foreach ($fields as $field) {
                 $resultFields[$field->field] = $this->renderSingleField($field);
             }
diff --git a/src/Logic/Resolvers/SortResolver.php b/src/Logic/Resolvers/SortResolver.php
index 7c2e5a0..e085d00 100644
--- a/src/Logic/Resolvers/SortResolver.php
+++ b/src/Logic/Resolvers/SortResolver.php
@@ -44,7 +44,7 @@ public function setSorters(SortUI|array $sorts): self
     public function apply(Builder $query): Builder
     {
         foreach ($this->sorts as $sort) {
-            $fields = $sort->fields();
+            $fields = app($sort)->fields();
             $this->handleFields($query, $fields);
         }
 
@@ -74,7 +74,7 @@ public function render(): array
     {
         $resultFields = [];
         foreach ($this->sorts as $sort) {
-            $fields = $sort->fields();
+            $fields = app($sort)->fields();
             foreach ($fields as $field) {
                 $resultFields[$field->field] = $this->renderSingleField($field);
             }