diff --git a/.changelog/v0.23.0/breaking-changes/40-tendermint-0.27.md b/.changelog/v0.23.0/breaking-changes/40-tendermint-0.27.md
new file mode 100644
index 00000000..a57614b4
--- /dev/null
+++ b/.changelog/v0.23.0/breaking-changes/40-tendermint-0.27.md
@@ -0,0 +1 @@
+- Update to tendermint-proto 0.27 ([#40](https://github.com/cosmos/ibc-proto-rs/pull/40))
diff --git a/.changelog/v0.23.0/summary.md b/.changelog/v0.23.0/summary.md
new file mode 100644
index 00000000..c150b6a8
--- /dev/null
+++ b/.changelog/v0.23.0/summary.md
@@ -0,0 +1,3 @@
+*November 29th, 2022*
+
+This release updates the Tendermint Protobuf definitons to v0.27.0.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 855cf636..7c40974a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # CHANGELOG
 
+## v0.23.0
+
+*November 29th, 2022*
+
+This release updates the Tendermint Protobuf definitons to v0.27.0.
+
+### BREAKING CHANGES
+
+- Update to tendermint-proto 0.27 ([#40](https://github.com/cosmos/ibc-proto-rs/pull/40))
+
 ## v0.22.0
 
 *November 9, 2022*