diff --git a/CHANGELOG.md b/CHANGELOG.md
index f666f122a..b1585b888 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ request related to the change, then we may provide the commit.
 v4.6
 ======
 - Fix issue [#1494](https://github.com/opensim-org/opensim-gui/issues/1494): Changing muscle path color throws exception.
+- Fix issue [#1493](https://github.com/opensim-org/opensim-gui/issues/1493): Rotating experimental data fails or results an unusable file.
 
 v4.5
 ======
diff --git a/Gui/opensim/threejs b/Gui/opensim/threejs
index 4d25e77fa..81e526325 160000
--- a/Gui/opensim/threejs
+++ b/Gui/opensim/threejs
@@ -1 +1 @@
-Subproject commit 4d25e77fa8787a3cdb3d29dc60d43bd1e9375fbd
+Subproject commit 81e526325c11aa8cb9be5da59d468a6f3bf7f6f4