diff --git a/modules/util/viirs_l1b_l2.py b/modules/util/viirs_l1b_l2.py
index e57245acdb2504dc7fd9b51268ca45bce1aa207c..7581b54cc79448172add97ce6885bafdf7f37a4e 100644
--- a/modules/util/viirs_l1b_l2.py
+++ b/modules/util/viirs_l1b_l2.py
@@ -73,7 +73,7 @@ def run_all(directory, out_directory):
                 label_tiles = []
 
                 try:
-                    run(data_h5f, label_h5f, data_tiles, label_tiles, mod_tile_width=32, kernel_size=7)
+                    run(data_h5f, label_h5f, data_tiles, label_tiles, mod_tile_width=32, kernel_size=5)
                 except Exception as e:
                     print(e)
                     data_h5f.close()