diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76f8350ea556d710d6b9f17cb76f64631412c268..c5c1ba8566895139917cd0360f6c4ec48374523a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] ##
+## [0.3.1] - 2021-12-06  ##
 
 ### Added ###
 - `check_reference_field` function to check whether entities with provided ids
@@ -12,16 +12,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - added the `datatypes` argument to `TableImporter` for columns that do not 
   need a special conversion function
 
-### Changed ###
-
-### Deprecated ###
-
-### Removed ###
-
-### Fixed ###
-
-### Security ###
-
 ## [0.3.0] - 2021-11-02 ##
 
 ### Added ###
diff --git a/setup.py b/setup.py
index 81695d77156a2225b12cb67b4c9d8a4677de5bb5..78040b9c2244ababdeafef5f59e31a42e3d723a6 100755
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ MAJOR = 0
 MINOR = 3
 MICRO = 1
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = False
+ISRELEASED = True
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)