Prepare CHANGELOG for 1.0.0-rc.1
-## 1.0.0-beta.3 (Unreleased)
+## HEAD (Unreleased)
+
+### Supported Kubernetes versions
+
+- v1.15.x
+- v1.14.x
+- v1.13.x
+
+### Improvements
+
+### Bug fixes
+
+## 1.0.0-rc.1 (August 28, 2019)
### Supported Kubernetes versions
