diff --git a/RELEASE.md b/RELEASE.md
index b3fc8f3..095a4c7 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -6,6 +6,9 @@
 
 ## Bug Fixes and Other Changes
 
+*   Bumped the Ubuntu version on which `struct2tensor` is tested to 20.04
+    (previously was 16.04).
+
 ## Breaking Changes
 
 ## Deprecations