diff --git a/src/Halcyon/Datasource/FileDatasource.php b/src/Halcyon/Datasource/FileDatasource.php
index b8cd59278..014ecfec4 100644
--- a/src/Halcyon/Datasource/FileDatasource.php
+++ b/src/Halcyon/Datasource/FileDatasource.php
@@ -34,6 +34,11 @@ class FileDatasource extends Datasource
      */
     protected $resolvedBasePaths = [];
 
+    /**
+     * The maximum depth of the filesystem to scan, defaulting to 1 subdirectory.
+     */
+    protected int $maxDepth = 1;
+
     /**
      * Create a new datasource instance.
      *
@@ -98,7 +103,7 @@ public function select(string $dirName, array $options = []): array
         }
 
         $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dirPath));
-        $it->setMaxDepth(1); // Support only a single level of subdirectories
+        $it->setMaxDepth($this->maxDepth);
         $it->rewind();
 
         while ($it->valid()) {
@@ -337,6 +342,10 @@ public function getAvailablePaths(): array
             ? new RecursiveIteratorIterator(new RecursiveDirectoryIterator($this->basePath))
             : [];
 
+        if (!is_array($it)) {
+            $it->setMaxDepth($this->maxDepth + 1);
+        }
+
         foreach ($it as $file) {
             if ($file->isDir()) {
                 continue;