diff --git a/README.md b/README.md
index 0b75a88..5d7a606 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Benchmark: Bigblue3
 Benchmark: Bigblue3\
 Fix macros and use DREAMPlace (classic optimization-based method) to place standard cells.
 
-<img src="imgs/standardcell.gif" width="250">
+<div align=center>!<img src="imgs/standardcell.gif" width="250">
 
 ### Full Benchmark demonstration