diff --git a/README.md b/README.md
index f87b7c4..7c69b34 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,13 @@ The script `SASO_BLS_offline.m` is in charged of testing SASO-BLS on discrete da
 </div>
 
 ### SASO-BLS (offline) 
-![Alt text](https://github.com/yilingo/SASO-BLS/blob/main/results_img/SASOBLS_offline.png)
+<div align=center>
+<img src="https://github.com/yilingo/SASO-BLS/blob/main/results_img/SASOBLS_offline.png">
+</div>
+
 
 ### SASO-BLS (online)
-![Alt text](https://github.com/yilingo/SASO-BLS/blob/main/results_img/SASOBLS_online.png)
+<div align=center>
+<img src="https://github.com/yilingo/SASO-BLS/blob/main/results_img/SASOBLS_online.png">
+</div>
+