diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5665cc8a..8e78ea4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 @samber: I sometimes forget to update this file. Ping me on [Twitter](https://twitter.com/samuelberthe) or open an issue in case of error. We need to keep a clear changelog for easier lib upgrade.
 
+## 1.34.0 (2022-10-xx)
+
+Improving:
+- lo.Union: faster and can receive more than 2 lists
+
 ## 1.33.0 (2022-10-14)
 
 Adding:
diff --git a/README.md b/README.md
index 06803933..3c74f3eb 100644
--- a/README.md
+++ b/README.md
@@ -1664,10 +1664,10 @@ left, right := lo.Difference[int]([]int{0, 1, 2, 3, 4, 5}, []int{0, 1, 2, 3, 4,
 
 ### Union
 
-Returns all distinct elements from both collections. Result will not change the order of elements relatively.
+Returns all distinct elements from given collections. Result will not change the order of elements relatively.
 
 ```go
-union := lo.Union[int]([]int{0, 1, 2, 3, 4, 5}, []int{0, 2, 10})
+union := lo.Union[int]([]int{0, 1, 2, 3, 4, 5}, []int{0, 2}, []int{0, 10})
 // []int{0, 1, 2, 3, 4, 5, 10}
 ```