diff --git a/CITATION.cff b/CITATION.cff
index c9cb4f3..82483dc 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,8 +1,8 @@
 cff-version: 1.2.0
 message: "If you use this software, please cite it as below."
 title: Euclid
-version: 2.0
-date-released: 2022-01-03
+version: 2.1
+date-released: 2022-03-27
 url: "https://github.com/BlueObelisk/cmlxom"
 preferred-citation:
   type: article
diff --git a/README.md b/README.md
index f1583a5..d885ef9 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ It's used a lot in CML tools (JUMBO, JUMBO-converters) and also AMI (for extract
 Instructions to increase the version:
 
 ```shell
-mvn versions:set -DnewVersion=2.1-SNAPSHOT
+mvn versions:set -DnewVersion=2.2-SNAPSHOT
 ```
 
 Deploy to Sonatype with the following commands, for snapshots and releases respectively:
diff --git a/pom.xml b/pom.xml
index 31cd28c..92f4097 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
   <groupId>org.blueobelisk</groupId>
   <artifactId>euclid</artifactId>
-  <version>2.1-SNAPSHOT</version>
+  <version>2.1</version>
   <packaging>jar</packaging>
 
   <properties>