diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e74fefde..b7163f51 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,3 +1,6 @@
+### 5.3.8
+- [e57] support for ScaledInteger with 33 to 63 bits (1 to 32, and 64 was already supported)
+
 ### 5.3.7
 - [Rendering.PointSet] fixed y-flipped picking