AWS CodePipeline not able to access Organization's repositories

I am trying to setup Continuous deployments pipelines in AWS Codepipeline.

While creating a pipeline I provide "Source provider" as GitHub and then connect to GitHub. I am able to see my public repositories in "Repository" drop-down in create Pipeline page. But I am not able to see my Organization's private repositories in this drop-down. I have write access in Organization.

How can I make AWS Codepipeline have access to my organizations repositories.