diff --git a/datalab/datalab_session/data_operations/median.py b/datalab/datalab_session/data_operations/median.py
index 49ef942..88299e4 100644
--- a/datalab/datalab_session/data_operations/median.py
+++ b/datalab/datalab_session/data_operations/median.py
@@ -95,7 +95,7 @@ def operate(self):
             hdu_list.writeto(fits_buffer)
             fits_buffer.seek(0)
 
-            # Write the HDU List to the output FITS file in bitbucket
+            # Write the HDU List to the output FITS file in the bucket
             response = store_fits_output(cache_key, fits_buffer)
 
         # TODO: No output yet, need to build a thumbnail service
diff --git a/datalab/datalab_session/util.py b/datalab/datalab_session/util.py
index d4ca246..de60796 100644
--- a/datalab/datalab_session/util.py
+++ b/datalab/datalab_session/util.py
@@ -8,7 +8,7 @@
 log = logging.getLogger()
 log.setLevel(logging.INFO)
 
-def store_fits_output(item_key, fits_buffer):
+def store_fits_output(item_key: str, fits_buffer: object) -> object:
   """
   Stores a fits into the operation bucket in S3