diff --git a/egs/librispeech_100h/conformer/run.sh b/egs/librispeech_100h/conformer/run.sh
index 160115466..569a57b01 100755
--- a/egs/librispeech_100h/conformer/run.sh
+++ b/egs/librispeech_100h/conformer/run.sh
@@ -19,8 +19,8 @@ lang=en
 token_type=bpe
 type=sound
 scp=wav.scp
-stage=0
-stop_stage=0
+stage=3
+stop_stage=4
 
 # feature configuration
 feats_dim=80
@@ -79,9 +79,9 @@ fi
 if [ ${stage} -le 0 ] && [ ${stop_stage} -ge 0 ]; then
     echo "stage 0: Data preparation"
     # Data preparation
-#    for x in dev-clean dev-other test-clean test-other train-clean-100; do
-#        local/data_prep.sh ${raw_data}/LibriSpeech/${x} ${feats_dir}/data/${x//-/_}
-#    done
+    for x in dev-clean dev-other test-clean test-other train-clean-100; do
+        local/data_prep.sh ${raw_data}/LibriSpeech/${x} ${feats_dir}/data/${x//-/_}
+    done
     mkdir $feats_dir/data/$valid_set
     dev_sets="dev_clean dev_other"
     for file in wav.scp text; do