diff --git a/CHANGELOG.md b/CHANGELOG.md
index af100326d106ee7e400a941774ff9aab27007538..5847bcfc7d66989a7ba7fa5f35af07241ee6e35a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,14 @@ 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).
 
-## [3.1.0] - 2021-01-26
+## [3.1.1] - 2021-01-27
+
+### Fixed
+
+- rename `master.build.properties` to `main.build.properties` to match the actual branch names.
+This is necessary to build a package and upload it to our package store (ci.de.dariah.eu).
+
+## [3.1.0] - 2021-01-27
 
 ### Changed
 
diff --git a/exist-app/build.properties b/exist-app/build.properties
index 9ebefb1d612053beeb0860d4f2174d91d4a9cf7d..64529fbb06c41c8472643327c58c8c789250b1dc 100644
--- a/exist-app/build.properties
+++ b/exist-app/build.properties
@@ -1,5 +1,5 @@
 project.name=https://ahikar-test.sub.uni-goettingen.de/
-project.version=3.1.0
+project.version=3.1.1
 project.title=Ahiqar
 project.abbrev=ahikar-test
 project.processorversion=5.2.0
diff --git a/exist-app/master.build.properties b/exist-app/main.build.properties
similarity index 100%
rename from exist-app/master.build.properties
rename to exist-app/main.build.properties