diff --git a/Dockerfile b/Dockerfile
index b0dc31664f63025138b9d362bfd13c33466db3d8..5b736105b1633d511dda401af3c4d9a3a96b57a9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,3 @@
 FROM redmine:5.1.3
-MAINTAINER Andrej Ramašeuski <andrej.ramaseuski@pirati.cz>
 
-RUN	apt update && apt install ruby-dev
+RUN	apt update && apt install -y ruby-dev