diff --git a/CHANGELOG.md b/CHANGELOG.md
index ddecb31..08688e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic
 Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [13.0.0] - 2019-05-18
 
 The minimum supported Rust version is now 1.34.0.
 
diff --git a/Cargo.toml b/Cargo.toml
index 2f9f2fb..a34bfa8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "im"
-version = "12.3.4"
+version = "13.0.0"
 authors = ["Bodil Stokke <bodil@bodil.org>"]
 edition = "2018"
 license = "MPL-2.0+"
diff --git a/rc/Cargo.toml b/rc/Cargo.toml
index 5ffe254..c052e6c 100644
--- a/rc/Cargo.toml
+++ b/rc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "im-rc"
-version = "12.3.4"
+version = "13.0.0"
 edition = "2018"
 authors = ["Bodil Stokke <bodil@bodil.org>"]
 license = "MPL-2.0+"