diff --git a/RELNOTES.md b/RELNOTES.md
index dcff843..a80c263 100644
--- a/RELNOTES.md
+++ b/RELNOTES.md
@@ -1,5 +1,7 @@
 # RC_Mongolian
 ## 2018-05-15
+* [#9](https://github.com/DataBiosphere/firecloud-app/issues/9): APIs now better support retrieval of subworkflow metadata and labels. Subworkflow metadata will be exposed in the FireCloud UI in a future release.
+* [#12](https://github.com/DataBiosphere/firecloud-app/issues/12): Actual workflow run cost is now returned in the submission status API, when available. This run cost will be exposed in the FireCloud UI in a future release.
 
 # RC_Likewu
 ## 2018-05-08