diff --git a/ChangeLog.md b/ChangeLog.md
index 0cb985e..44e82f4 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,6 +3,8 @@ XP Math changelog
 
 ## ?.?.? / ????-??-??
 
+## 9.1.0 / 2022-03-25
+
 * Deprecated doubleValue() in favor of floatValue() - @thekid
 * Merged PR #3: Comparison and equality - @thekid