diff --git a/.changelog/unreleased/breaking-changes/90-tendermint-proto-0.31.md b/.changelog/unreleased/breaking-changes/90-tendermint-proto-0.31.md
new file mode 100644
index 00000000..a96d2e24
--- /dev/null
+++ b/.changelog/unreleased/breaking-changes/90-tendermint-proto-0.31.md
@@ -0,0 +1,2 @@
+- Update `tendermint-proto` to v0.31.x
+  ([\#90](https://github.com/cosmos/ibc-proto-rs/pull/90))