diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 596efb57ed8760ae7604403146a428f4a2c79f95..fcd369b7a831bacc4013bc0317bb67e79bd8bfc6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ image: docker:19.03.12
 
 variables:
   DOCKER_TLS_CERTDIR: "/certs"
-  IMAGE_VER: 3.4.13-passenger-2
+  IMAGE_VER: 4.2.1-passenger-2
 
 services:
   - docker:19.03.12-dind
diff --git a/Dockerfile b/Dockerfile
index 580d6df3690a621a3b7ac1ac4bfc8bf413c40766..9bd5374a57e6ef5222d4fdddc527e263fb4da4b2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM redmine:3.4.13-passenger
+FROM redmine:4.2.1-passenger
 MAINTAINER Andrej Ramašeuski <andrej.ramaseuski@pirati.cz>
 
 RUN	apt-get update && \