diff --git a/egs/himia/wuw/README.md b/egs/himia/wuw/README.md
index 50d92ccd9..f557aaaaf 100644
--- a/egs/himia/wuw/README.md
+++ b/egs/himia/wuw/README.md
@@ -6,5 +6,5 @@ AUC results for different epochs could be found at <https://huggingface.co/GuoLi
 
 E.g. for epoch 15 and avg 1, result log file is: <https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/blob/main/exp_max_duration_100/post/epoch_15-avg_1/log/log-auc-himia_aishell-2023-03-16-17-42-14>
 
-Corresponding ROC curve is: <https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/blob/main/exp_max_duration_100/post/epoch_15-avg_1/himia_aishell.pdf>
+Corresponding ROC curve is: <https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/blob/main/exp_max_duration_100/post/epoch_15-avg_1/himia_aishell.png>
 
diff --git a/egs/himia/wuw/RESULTS.md b/egs/himia/wuw/RESULTS.md
index 7b7006d36..21a331202 100644
--- a/egs/himia/wuw/RESULTS.md
+++ b/egs/himia/wuw/RESULTS.md
@@ -10,8 +10,7 @@ Here is the result for epoch_15-avg_1(with the highest AUC).
 |  ----  | ----  | ----|
 | AUC  | 0.9597 |0.9292|
 
-HiMia-CW
-![himia_cw](https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/resolve/main/exp_max_duration_100/post/epoch_15-avg_1/himia_cw.pdf)
+![himia_aishell](https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/resolve/main/exp_max_duration_100/post/epoch_15-avg_1/himia_aishell.png)
+
+![himia_cw](https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/resolve/main/exp_max_duration_100/post/epoch_15-avg_1/himia_cw.png)
 
-HiMia-Aishell
-![himia_aishell](https://huggingface.co/GuoLiyong/himia_ctc_tdnn_baseline/resolve/main/exp_max_duration_100/post/epoch_15-avg_1/himia_aishell.pdf)
diff --git a/egs/himia/wuw/local/auc.py b/egs/himia/wuw/local/auc.py
index f5a210d87..09f2a276b 100755
--- a/egs/himia/wuw/local/auc.py
+++ b/egs/himia/wuw/local/auc.py
@@ -124,7 +124,7 @@ def main():
 
     output_path = Path(args.positive_score_file).parent
     logging.info(f"AUC of {args.legend} {output_path}: {roc_auc}")
-    plt.savefig(f"{output_path}/{args.legend}.pdf", bbox_inches="tight")
+    plt.savefig(f"{output_path}/{args.legend}.png", bbox_inches="tight")
 
 
 if __name__ == "__main__":