diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8a0a7bc..06b7a7b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change Log
 
-## [Unreleased]
+## [0.3.1] - 2017-05-29
 
 ### Added
 
@@ -176,7 +176,8 @@ represents the first three bases of chromosome 1.
 
 First release
 
-[Unreleased]: https://github.com/chrovis/cljam/compare/0.3.0...HEAD
+[Unreleased]: https://github.com/chrovis/cljam/compare/0.3.1...HEAD
+[0.3.1]: https://github.com/chrovis/cljam/compare/0.3.0...0.3.1
 [0.3.0]: https://github.com/chrovis/cljam/compare/0.2.1...0.3.0
 [0.2.1]: https://github.com/chrovis/cljam/compare/0.2.0...0.2.1
 [0.2.0]: https://github.com/chrovis/cljam/compare/0.1.6...0.2.0
diff --git a/README.md b/README.md
index d240af05..a6b9c659 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ cljam is available as a Maven artifact from [Clojars][clojars].
 To use with Leiningen/Boot, add the following dependency.
 
 ```clojure
-[cljam "0.3.0"]
+[cljam "0.3.1"]
 ```
 
 To use with Maven, add the following dependency.
@@ -26,7 +26,7 @@ To use with Maven, add the following dependency.
 <dependency>
   <groupId>cljam</groupId>
   <artifactId>cljam</artifactId>
-  <version>0.3.0</version>
+  <version>0.3.1</version>
 </dependency>
 ```
 
@@ -103,8 +103,8 @@ Run `lein-bin` plugin and it creates standalone console executable into `target`
 
 ```console
 $ lein with-profile +1.8 bin
-Created /path/to/cljam/target/cljam-0.3.0.jar
-Created /path/to/cljam/target/cljam-0.3.0-standalone.jar
+Created /path/to/cljam/target/cljam-0.3.1.jar
+Created /path/to/cljam/target/cljam-0.3.1-standalone.jar
 Creating standalone executable: /path/to/cljam/target/cljam
 ```
 
diff --git a/project.clj b/project.clj
index 2a208009..a1f09cbc 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject cljam "0.3.1-SNAPSHOT"
+(defproject cljam "0.3.1"
   :description "A DNA Sequence Alignment/Map (SAM) library for Clojure"
   :url "https://github.com/chrovis/cljam"
   :license {:name "Apache License, Version 2.0"