diff --git a/README.md b/README.md
index bae873ef1..017128b07 100644
--- a/README.md
+++ b/README.md
@@ -7,4 +7,8 @@ gpm(Go Package Manager) is a Go package manage tool for search, install, update
 
 ## Todo
 
-- Command `install` add support for code.google.com, launchpad.net, bitbucket.org.
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+- Command `install` add support for downloading code from code.google.com, launchpad.net, bitbucket.org; hopefully, support user sources for downloading tarballs.
+- After downloaded all packages in bundles or snapshots, need to check if all dependencies have been downloaded as well.
+- Develop user source API server template application to support user sources in bundles.
+- Add bundle and snapshot parser code for downloading by bundle or snapshot id.
+- Add user system to create, edit, upload, and download bundles or snapshots through gpm client program.
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