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See the Changelog for a complete list of changes from VCR 1.x to 2.0. This file simply lists the most pertinent ones to upgrading.

Configuration Changes

In VCR 1.x, your configuration block would be something like this:

VCR.config do |c|
  c.cassette_library_dir = 'cassettes'
  c.stub_with :fakeweb, :typhoeus

This will continue to work in VCR 2.0 but will generate deprecation warnings. Instead, you should change this to:

VCR.configure do |c|
  c.cassette_library_dir = 'cassettes'
  c.hook_into :fakeweb, :typhoeus

New Cassette Format

The cassette format has changed between VCR 1.x and VCR 2.0. VCR 1.x cassettes cannot be used with VCR 2.0.

The easiest way to upgrade is to simply delete your cassettes and re-record all of them. VCR also provides a rake task that attempts to upgrade your 1.x cassettes to the new 2.0 format. To use it, add the following line to your Rakefile:

load 'vcr/tasks/vcr.rake'

Then run rake vcr:migrate_cassettes DIR=path/to/your/cassettes/directory to upgrade your cassettes. Note that this rake task may be unable to upgrade some cassettes that make extensive use of ERB. In addition, now that VCR 2.0 does less normalization then before, it may not be able to migrate the cassette perfectly. It's recommended that you delete and re-record your cassettes if you are able.