diff --git a/CHANGELOG.md b/CHANGELOG.md
index faeaac08..feb99c14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - support for SPARQL endpoints
 - support for TPF servers
 
+## [4.0.0] - 2018-09-03
+
+### Added
+- support for config file
+- no difference between triples and quads when writing output to file
+
 ## [0.2.1] - 2018-08-14
 
 ### Fixed
@@ -74,6 +80,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - support for accessing remote files (via HTTP GET)
 - basic support for functions
 
+[4.0.0]: https://github.com/RMLio/rmlmapper-java/compare/v0.2.1...v4.0.0
 [0.2.1]: https://github.com/RMLio/rmlmapper-java/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/RMLio/rmlmapper-java/compare/v0.1.6...v0.2.0
 [0.1.6]: https://github.com/RMLio/rmlmapper-java/compare/v0.1.5...v0.1.6
diff --git a/README.md b/README.md
index 7309d125..eb1f9c4f 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ The RMLMapper loads all data in memory, so be aware when working with big datase
   - JSON files (JSONPath)
   - XML files (XPath)
 - functions (most cases)
-- output formats: ntriples and nquads
+- output formats: nquads
 
 ### Future
 - functions (all cases)
@@ -29,7 +29,7 @@ The RMLMapper loads all data in memory, so be aware when working with big datase
 - output formats: turtle, trig
 
 ## Build
-The RMLMaper is build using Maven: `mvn install`.
+The RMLMapper is build using Maven: `mvn install`.
 A standalone jar can be found in `/target`.
 
 ## Usage
diff --git a/pom.xml b/pom.xml
index 1dba7fb8..3438dc17 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>be.ugent.rml</groupId>
     <artifactId>rmlmapper</artifactId>
-    <version>0.2.1</version>
+    <version>4.0.0</version>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <junit.version>4.12</junit.version>