diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b6243ab..f0b7363c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [Unreleased]
+## [0.9.1] - 2026-07-11
 
 ### Added
 - A characterization method declared in the TOML configuration can carry
diff --git a/volca.cabal b/volca.cabal
index 5f0d10d9..859cb7ee 100644
--- a/volca.cabal
+++ b/volca.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                volca
-version:             0.9.1-dev
+version:             0.9.1
 build-type:          Simple
 
 license:             Apache-2.0