Release version 2.5.3

CHANGELOG.md

 # Changelog
 
+## 2.5.3
+This is a maintenance release which only brings libraries up to date to fix
+potential bugs.
+
 ## 2.5.2
 This is a maintenance release which only brings libraries up to date to fix
 potential bugs.

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.thm.arsnova</groupId>
 	<artifactId>arsnova-backend</artifactId>
-	<version>2.5.3-SNAPSHOT</version>
+	<version>2.5.3</version>
 	<packaging>war</packaging>
 
 	<properties>