diff --git a/config.json b/config.json
index bad8e69..14c6c8c 100644
--- a/config.json
+++ b/config.json
@@ -33,6 +33,7 @@
   "mask_time_length": 10,
   "mask_time_min_masks": 2,
   "mask_time_prob": 0.05,
+  "max_length": 448,
   "max_source_positions": 1500,
   "max_target_positions": 448,
   "median_filter_width": 7,