GET from CloudFront after PUT returns old data

I am using CloudFront to access my S3 bucket. I perform both GET and PUT operations to retrieve and update the data. The problem is that after i send PUT request with new data, GET request still returns the older data. I do see that the file is updated in S3 bucket. I am performing both GET and PUT from iOS application. However, i tried performing GET request using regular browsers and i still receive older data. Do i need to do anything in addition to make CloudFront refresh its data?