diff --git a/CHANGELOG.md b/CHANGELOG.md
index f3013a6ca87f6799c15ebd62891bdb3b4716b2fc..a1aefc0755e33ef718bfe82bd8afa9dddc59a3c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,8 @@ release.
 
 ## [Unreleased]
 
+### Fixed
+- Updated documentation string for `compute_covariance`. [#177](https://github.com/USGS-Astrogeology/plio/pull/177)
 
 ## [1.5.0]()