diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca4ebd6..3472193 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,6 @@ Adheres to [Semantic Versioning](http://semver.org/).
 
 ---
 
-## 1.0.0 (TBD)
+## [1.0.0](https://github.com/ngageoint/coordinate-reference-systems-ios/releases/tag/1.0.0) (09-16-2021)
 
 * Initial Release