diff --git a/Robust-Graph-Optimization.md b/Robust-Graph-Optimization.md
index e5a29d7..af8184f 100644
--- a/Robust-Graph-Optimization.md
+++ b/Robust-Graph-Optimization.md
@@ -20,7 +20,7 @@ If you are using ROS, you can set the parameters of the rtabmap node like that i
 ```
 
 ## Example
-The video above can be reproduced with this database: [robust_graph_optimization_stereo.db](https://raw.githubusercontent.com/wiki/introlab/rtabmap/doc/Tutorials/RobustGraphOptimization/robust_graph_optimization_stereo.db) (33 MB).
+The video above can be reproduced with this database: [robust_graph_optimization_stereo.db](https://raw.githubusercontent.com/wiki/introlab/rtabmap/doc/Tutorials/RobustGraphOptimization/robust_graph_optimization_stereo.db) (32 MB).
 
  1. Open RTAB-Map.
  2. Open Preferences dialog.