diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56c1e0342..f71536749 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ Added: Horizontal/Vertical flip capability to images [\#824](https://github.com/
 - Fixed: bug when evaluating `catAxisLabelPos`,`valAxisLabelPos` props [\#829](https://github.com/gitbrent/PptxGenJS/pull/829) ([twatson83](https://github.com/twatson83))
 - Fixed: secondary axis param (`secondaryValAxis`) check [\#832](https://github.com/gitbrent/PptxGenJS/pull/832) ([twatson83](https://github.com/twatson83))
 - Fixed: `addSection` method missing return type in `index.d.ts` [\#833](https://github.com/gitbrent/PptxGenJS/issues/833) ([dylang](https://github.com/dylang))
+- Fixed: several rounding mistakes for precision, accuracy, and usability [\#840](https://github.com/gitbrent/PptxGenJS/pull/840) ([michaelcbrook](https://github.com/michaelcbrook))
 - Fixed: colspan/rowspan [\#852](https://github.com/gitbrent/PptxGenJS/pull/852) ([wangfengming](https://github.com/wangfengming))
 ### Internal Updates
 - Library Updates: TypeScript 4, Rollup 2.3 and more [\#866](https://github.com/gitbrent/PptxGenJS/pull/866) ([gitbrent](https://github.com/gitbrent))