diff --git a/.gitignore b/.gitignore
index 656cfe90..8003242d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,6 +91,9 @@ deploy/nginx/ssl/*.pem
 # Deploy env
 deploy/.env
 
+# Private files excluded from opensource sync
+UPGRADING.md
+
 # Claude Code local settings
 CLAUDE.md
 .claude/settings.local.json