diff --git a/readme.md b/readme.md
index 54c0a5cbe37dfe2d4ca79f5eca979f2c76cb9836..e01565cfbc25a2331137b47319b171998005980e 100644
--- a/readme.md
+++ b/readme.md
@@ -201,7 +201,7 @@ MOT16/17 private detections:
 
 ## Demo <a name="demo">
 <div align="center">
-  <img src="https://gitlab.inria.fr/yixu/deepmot/-/raw/master/trackingresults.gif?inline=false" width="800px" />
+  <img src="https://gitlab.inria.fr/yixu/deepmot/-/raw/master/trackingresults.gif?inline=false" width="500px" />
 </div>
 
 ## Acknowledgement <a name="Acknowledgement">