diff --git a/Cargo.toml b/Cargo.toml
index 73ea6be5..f82ac3b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "indexmap"
 edition = "2021"
-version = "2.2.5"
+version = "2.2.6"
 documentation = "https://docs.rs/indexmap/"
 repository = "https://github.com/indexmap-rs/indexmap"
 license = "Apache-2.0 OR MIT"
diff --git a/RELEASES.md b/RELEASES.md
index 4e11c545..8c033db0 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,5 +1,9 @@
 # Releases
 
+## 2.2.6
+
+- Added trait `MutableValues` for opt-in mutable access to set values.
+
 ## 2.2.5
 
 - Added optional `borsh` serialization support.