@@ -7,6 +7,22 @@ be found.

 ## 1.13.0 (2016-12-08)

+**IMPORTANT**: In Docker 1.13 managed plugin api changed from the experimental

+version introduced in Docker 1.12. Plugins installed with Docker 1.12 should

+therefore be **uninstalled** _before_ upgrading to Docker 1.13. You can

+uninstall plugins using the `docker plugin rm` command.

+

+If you have already upgraded to Docker 1.13 without uninstalling plugins, and

+get this error message during docker daemon startup;

+

+    Error starting daemon: json: cannot unmarshal string into Go value of type types.PluginEnv

+

+Take the following steps to manually remove all plugins;

+

+- Remove plugins.json from: `/var/lib/docker/plugins/`

+- Restart Docker

+- Reinstall your plugins

+

 ### Builder

 + Add capability to specify images used as a cache source on build. These images do not need to have local parent chain and can be pulled from other registries [#26839](https://github.com/docker/docker/pull/26839)

 + (experimental) Add option to squash image layers to the FROM image after successful builds [#22641](https://github.com/docker/docker/pull/22641)