[PIO-89] Add deprecation notice to release notes
diff --git a/RELEASE.md b/RELEASE.md
index 1b40ce1..03d115e 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -19,6 +19,14 @@
**Note:** For upgrade instructions please refer to [this page](http://predictionio.apache.org/resources/upgrade/).
+## Deprecation Notice
+
+### 0.13.0
+
+- Support for Scala 2.10.x and Spark 1.x are now deprecated. The next non-patch
+ version of PredictionIO may no longer support them
+ ([PIO-158](https://issues.apache.org/jira/browse/PIO-158)).
+
## Version History
### 0.13.0
