diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3faa312..058dd07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+### [v15.20.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.20.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.19.3...v15.20.0 "diff with v15.19.3")
+*   2021-06-29 [`c982876`](https://github.com/nophead/NopSCADlib/commit/c982876ebc0f95b466de1af3c80642dfd88800e6 "show commit") [C.P.](# "Chris Palmer") Can now specify the screw used for PSU shrouds and get the wall thickness.
+
 #### [v15.19.3](https://github.com/nophead/NopSCADlib/releases/tag/v15.19.3 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v15.19.2...v15.19.3 "diff with v15.19.2")
 *   2021-06-17 [`92d0444`](https://github.com/nophead/NopSCADlib/commit/92d0444e5f96c8f4768afb3d014044d7e66c6e69 "show commit") [C.P.](# "Chris Palmer") Changelog now runs codespell to fix the spellings in the commit comments.