diff --git a/CHANGES b/CHANGES
index 514a643..f96d145 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+# 0.3.1
+
+* Use the portable optimizer_hide() when running under Miri.
+
 # 0.3.0
 
 * Use black_box instead of volatile read when inline assembly is not
diff --git a/Cargo.toml b/Cargo.toml
index 112bc78..ac78bff 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "constant_time_eq"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2021"
 authors = ["Cesar Eduardo Barros <cesarb@cesarb.eti.br>"]
 description = "Compares two equal-sized byte strings in constant time."