diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cf92978dc..a9866f702e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,9 +10,12 @@ and this project adheres to
 
 - cosmwasm-std: Add `FromStr` impl for `Coin`. ([#1684])
 - cosmwasm-std: Add `Coins` helper to handle multiple coins. ([#1687])
+- cosmwasm-std: Allow sign extension Wasm opcodes in static validation. This
+  allows contracts to be compiled with Rust 1.70.0 and above. ([#1727])
 
 [#1684]: https://github.com/CosmWasm/cosmwasm/pull/1684
 [#1687]: https://github.com/CosmWasm/cosmwasm/pull/1687
+[#1727]: https://github.com/CosmWasm/cosmwasm/issues/1727
 
 ### Changed