diff --git a/changelog/unreleased/issue-21 b/changelog/unreleased/issue-21
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+Enhancement: Add comppression support
+
+We have added compression support to the restic repository format. To create a
+repository using the new format run `init --repository-version 2`. Please note
+that the repository cannot be read by restic versions prior to 0.14.0.
+
+The new format version has not received much testing yet. Do not rely on it as
+your only backup copy! Please run `check` in regular intervals to detect any
+problems.
+
+Upgrading in place is not yet supported. As a workaround, first create a new
+repository using `init --repository-version 2 --copy-chunker-params --repo2 path/to/old/repo`.
+Then use the `copy` command to copy all snapshots to the new repository.
+
+https://github.com/restic/restic/issues/21
+https://github.com/restic/restic/pull/3666