diff --git a/app/Services/Pacs/StudyImporter.php b/app/Services/Pacs/StudyImporter.php
index 7422f4d..f6e107b 100644
--- a/app/Services/Pacs/StudyImporter.php
+++ b/app/Services/Pacs/StudyImporter.php
@@ -148,7 +148,7 @@ private function prepareData(mixed $orthanc_src): array
         $series = [];
         foreach ($orthanc_src['Series'] as $ser) {
             $params = [
-                'orthanc_uid' => $ser['ID'],
+                'orthanc_uid' => strtolower($ser['ID']),
                 'series_instance_uid' => data_get($ser, 'MainDicomTags.SeriesInstanceUID'),
                 'series_date' => DicomUtils::dateTimeToCarbon($ser['MainDicomTags']['SeriesDate'], $ser['MainDicomTags']['SeriesTime']),
                 'series_number' => data_get($ser, 'MainDicomTags.SeriesNumber'),
@@ -183,9 +183,16 @@ private function updateStudy(int $row_id, mixed $study): void
         $data = $this->prepareData($study);
         unset($data['study']['orthanc_uid']);
         DB::table('studies')->where('id', $row_id)->update($data['study']);
+
         if (! empty($data['details'])) {
             DB::table('study_details')->where('study_id', $row_id)->update($data['details']);
         }
+
+        foreach ($study['series'] as $series) {
+            $series_id = $series['orthanc_uid'];
+            unset($series['orthanc_uid']);
+            DB::table('study_series')->where('orthanc_uid', $series_id)->update($series);
+        }
     }
 
     private function insertStudy(mixed $study): void
@@ -194,5 +201,10 @@ private function insertStudy(mixed $study): void
         $study = Study::create($data['study']);
         $data['details']['study_id'] = $study->id;
         StudyDetails::create($data['details']);
+
+        foreach ($study['series'] as $series) {
+            $series['study_id'] = $study->id;
+            DB::table('study_series')->insert($series);
+        }
     }
 }