diff --git a/.gitignore b/.gitignore
index bf99b48..6619040 100644
--- a/.gitignore
+++ b/.gitignore
@@ -73,4 +73,6 @@ data/*.csv
 
 # Async logs
 async_logs/
-asset/sec/
\ No newline at end of file
+asset/sec/
+# Original PDF (using PNG version)
+asset/diagram.pdf