diff --git a/Classes/DataProcessing/ContentBlockDataDecorator.php b/Classes/DataProcessing/ContentBlockDataDecorator.php
index f71dd1c8..9e41f8c3 100644
--- a/Classes/DataProcessing/ContentBlockDataDecorator.php
+++ b/Classes/DataProcessing/ContentBlockDataDecorator.php
@@ -120,16 +120,14 @@ private function handleRelation(
         ?PageLayoutContext $context = null,
     ): mixed {
         $resolvedField = $resolvedRelation->resolved[$tcaFieldDefinition->getUniqueIdentifier()];
-        $fieldTypeName = $tcaFieldDefinition->getFieldType()->getName();
-        $fieldTypeEnum = FieldType::tryFrom($fieldTypeName);
-        $resolvedField = match ($fieldTypeEnum) {
-            FieldType::COLLECTION,
-            FieldType::RELATION => $this->transformMultipleRelation(
+        $fieldType = $tcaFieldDefinition->getFieldType();
+        $resolvedField = match ($fieldType::getTcaType()) {
+            'inline', 'group', 'category' => $this->transformMultipleRelation(
                 $resolvedField,
                 $depth,
                 $context,
             ),
-            FieldType::SELECT => $this->transformSelectRelation(
+            'select' => $this->transformSelectRelation(
                 $resolvedField,
                 $depth,
                 $context,
diff --git a/Classes/DataProcessing/RelationResolver.php b/Classes/DataProcessing/RelationResolver.php
index 9fcb396b..9675d95d 100644
--- a/Classes/DataProcessing/RelationResolver.php
+++ b/Classes/DataProcessing/RelationResolver.php
@@ -90,8 +90,8 @@ public function processField(
         array $record,
         string $table
     ): mixed {
-        $fieldTypeName = $tcaFieldDefinition->getFieldType()->getName();
-        $fieldTypeEnum = FieldType::tryFrom($fieldTypeName);
+        $fieldType = $tcaFieldDefinition->getFieldType();
+        $tcaType = $fieldType::getTcaType();
         $recordIdentifier = $tcaFieldDefinition->getUniqueIdentifier();
         if (!array_key_exists($recordIdentifier, $record)) {
             throw new \RuntimeException(
@@ -101,21 +101,21 @@ public function processField(
             );
         }
         $data = $record[$recordIdentifier];
-        if ($fieldTypeEnum === FieldType::FILE) {
+        if ($tcaType === 'file') {
             $fileCollector = GeneralUtility::makeInstance(FileCollector::class);
             $fileCollector->addFilesFromRelation($table, $recordIdentifier, $record);
             return $fileCollector->getFiles();
         }
-        if ($fieldTypeEnum === FieldType::COLLECTION) {
+        if ($tcaType === 'inline') {
             return $this->processCollection($table, $record, $tcaFieldDefinition, $typeDefinition);
         }
-        if ($fieldTypeEnum === FieldType::CATEGORY) {
+        if ($tcaType === 'category') {
             return $this->processCategory($tcaFieldDefinition, $typeDefinition, $table, $record);
         }
-        if ($fieldTypeEnum === FieldType::RELATION) {
+        if ($tcaType === 'group') {
             return $this->processRelation($tcaFieldDefinition, $typeDefinition, $table, $record);
         }
-        if ($fieldTypeEnum === FieldType::FOLDER) {
+        if ($tcaType === 'folder') {
             $fileCollector = GeneralUtility::makeInstance(FileCollector::class);
             $folders = GeneralUtility::trimExplode(',', (string)$data, true);
             /** @var FolderFieldType $folderFieldType */
@@ -123,13 +123,13 @@ public function processField(
             $fileCollector->addFilesFromFolders($folders, $folderFieldType->isRecursive());
             return $fileCollector->getFiles();
         }
-        if ($fieldTypeEnum === FieldType::SELECT) {
+        if ($tcaType === 'select') {
             return $this->processSelect($tcaFieldDefinition, $typeDefinition, $table, $record);
         }
-        if ($fieldTypeEnum === FieldType::FLEXFORM) {
+        if ($tcaType === 'flex') {
             return $this->flexFormService->convertFlexFormContentToArray($data);
         }
-        if ($fieldTypeEnum === FieldType::JSON) {
+        if ($tcaType === 'json') {
             $platform = GeneralUtility::makeInstance(ConnectionPool::class)
                 ->getConnectionForTable($table)
                 ->getDatabasePlatform();
diff --git a/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/EditorInterface.yaml b/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/EditorInterface.yaml
index 2b4bc417..e63f812e 100644
--- a/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/EditorInterface.yaml
+++ b/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/EditorInterface.yaml
@@ -30,3 +30,5 @@ fields:
     type: Select
     renderType: selectSingle
     foreign_table: tt_content
+  - identifier: categories
+    type: Category
diff --git a/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/Source/Frontend.html b/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/Source/Frontend.html
index 734f54d9..64764872 100644
--- a/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/Source/Frontend.html
+++ b/Tests/Fixtures/Extensions/test_content_blocks_c/ContentBlocks/ContentElements/simple-relation/Source/Frontend.html
@@ -44,3 +44,9 @@
 <f:if condition="{data.circular_select}">
     Circular select uid: {data.circular_select.circular_select.uid}
 </f:if>
+<f:if condition="{data.categories}">
+    <f:for each="{data.categories}" as="category">
+        Category table: {category.tableName}
+        {category.title}
+    </f:for>
+</f:if>
diff --git a/Tests/Functional/Frontend/ContentBlockFrontendRenderingTest.php b/Tests/Functional/Frontend/ContentBlockFrontendRenderingTest.php
index 46eb2312..07ea7d9c 100644
--- a/Tests/Functional/Frontend/ContentBlockFrontendRenderingTest.php
+++ b/Tests/Functional/Frontend/ContentBlockFrontendRenderingTest.php
@@ -258,4 +258,22 @@ public function circularRelationsResolved(): void
         self::assertStringContainsString('Circular relation uid: 1', $html);
         self::assertStringContainsString('Circular select uid: 1', $html);
     }
+
+    #[Test]
+    public function categoryRelationResolved(): void
+    {
+        $this->importCSVDataSet(__DIR__ . '/Fixtures/DataSet/categories.csv');
+        $this->setUpFrontendRootPage(
+            self::ROOT_PAGE_ID,
+            [
+                'EXT:content_blocks/Tests/Functional/Frontend/Fixtures/frontend.typoscript',
+            ]
+        );
+        $response = $this->executeFrontendSubRequest((new InternalRequest())->withPageId(self::ROOT_PAGE_ID));
+        $html = (string)$response->getBody();
+
+        self::assertStringContainsString('Category table: sys_category', $html);
+        self::assertStringContainsString('Category 1', $html);
+        self::assertStringContainsString('Category 2', $html);
+    }
 }
diff --git a/Tests/Functional/Frontend/Fixtures/DataSet/categories.csv b/Tests/Functional/Frontend/Fixtures/DataSet/categories.csv
new file mode 100644
index 00000000..1932cd26
--- /dev/null
+++ b/Tests/Functional/Frontend/Fixtures/DataSet/categories.csv
@@ -0,0 +1,14 @@
+"pages"
+,"uid","pid","title","doktype"
+,2,1,"Record Storage",254
+"sys_category"
+,"uid","pid","title"
+,1,2,"Category 1"
+,2,2,"Category 2"
+"sys_category_record_mm"
+,"uid_local","uid_foreign","tablenames","fieldname"
+,1,1,"tt_content","simple_simplerelation_categories"
+,2,1,"tt_content","simple_simplerelation_categories"
+"tt_content"
+,"uid","pid","t3ver_oid","t3ver_wsid","simple_simplerelation_categories","CType"
+,1,1,0,0,"2","simple_simplerelation"