diff --git a/models/match/dssm/config.yaml b/models/match/dssm/config.yaml
index 77a2e9d1e01ae2c77d6fc18481e8382b31afeb94..7854def2ac50a16cfb8bf2bbd3db5d8577856fe6 100755
--- a/models/match/dssm/config.yaml
+++ b/models/match/dssm/config.yaml
@@ -32,7 +32,7 @@ hyper_parameters:
     class: adam
     learning_rate: 0.001
     strategy: sync
-  trigram_d: 6327
+  trigram_d: 2900
   neg_num: 1
   slice_end: 8
   fc_sizes: [300, 300, 128]