diff --git a/atlas/models.py b/atlas/models.py
index 7d72474f..91f952d8 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -1,3 +1,4 @@
+from functools import lru_cache
 import json
 import os
 import pathlib
@@ -575,6 +576,7 @@ class Series(SeriesBase):
             "<a href='{}'>{}</a>", self.get_absolute_url(), self.get_full_str()
         )
 
+    @lru_cache(maxsize=128)
     def get_series_dicom_json(self):
         instances = []