diff --git a/Documentation/upgrades/upgrade_3_3.md b/Documentation/upgrades/upgrade_3_3.md
index b725aefcf9e4..4e7d8f0eb243 100644
--- a/Documentation/upgrades/upgrade_3_3.md
+++ b/Documentation/upgrades/upgrade_3_3.md
@@ -72,27 +72,17 @@ cfg.SetupLogging()
 
 Set `embed.Config.Debug` field to `true` to enable gRPC server logs.
 
-#### Change in `/health` endpoint response value
+#### Change in `/health` endpoint response
 
-Previously, `[endpoint]:[client-port]/health` returned manually marshaled JSON value. 3.3 now defines [`etcdhttp.Health`](https://godoc.org/github.com/coreos/etcd/etcdserver/api/etcdhttp#Health) struct and includes errors, if any. Note that `"health"` field in `etcdhttp.Health` is `string` type (was boolean in v3.3.0-rc.0,1,2 but reverted to `string` for backward compatibilities).
+Previously, `[endpoint]:[client-port]/health` returned manually marshaled JSON value. 3.3 now defines [`etcdhttp.Health`](https://godoc.org/github.com/coreos/etcd/etcdserver/api/etcdhttp#Health) struct.
 
-Before
+Note that in v3.3.0-rc.0, v3.3.0-rc.1, and v3.3.0-rc.2, `etcdhttp.Health` has boolean type `"health"` field and `"errors"` field. For backward compatibilities, we reverted `"health"` field to `string` type and removed `"errors"` field. Further health information would be provided in separate APIs.
 
 ```bash
 $ curl http://localhost:2379/health
 {"health":"true"}
 ```
 
-After
-
-```bash
-$ curl http://localhost:2379/health
-{"health":"true"}
-
-# Or
-{"health":"false","errors":["NOSPACE"]}
-```
-
 #### Change in gRPC gateway HTTP endpoints (replaced `/v3alpha` with `/v3beta`)
 
 Before