diff --git a/CHANGELOG.md b/CHANGELOG.md
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+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
+### 2.1.0 - 2024-03-29
+- feat: Transition matrix solver. [#17](https://github.com/washingtonpost/elex-solver/pull/17)
+
 ### 2.0.1 - 2023-10-20
-- chore: Updated all required packages to their latest versions.  Added `numpy` as a requirement. [#14](https://github.com/washingtonpost/elex-solver/pull/14)	
+- chore: Updated all required packages to their latest versions.  Added `numpy` as a requirement. [#14](https://github.com/washingtonpost/elex-solver/pull/14)
 
 ### 2.0.0 - 2023-09-22
 - feat: adding ordinary least squares regression solver. Updating quantile regression to solve dual [#11](https://github.com/washingtonpost/elex-solver/pull/11)