diff --git a/README.md b/README.md
index e656f3c..52a07b7 100755
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Click [here](https://docs.google.com/presentation/d/1bVEbH_n6qjD9XH86hw7RFReb9AC
 
 Step 2-6 could be visualized:
 
-![pmdda](https://yufree.github.io/presentation/figure/pmdda.gif)
+<img src="https://yufree.github.io/presentation/figure/pmdda.gif" width="600">
 
 ## Packages