If you use Pusher then you might face following error. The error happens when you try to use Pusher client library from https.
The page at 'https://shekhargulati.com/blog/1#/' was loaded over HTTPS, but ran insecure content from 'http://js.pusher.com/2.1/pusher.min.js': this content should also be loaded over HTTPS.
To fix this error, you should use Pusher Cloudfront CDN version as shown below. In your HTML or other template use following. Replace 2.1 with your own version.