diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 030618a97f0824f445af4b391b119b7459bae974..2917509df0c26eaaae796919b4d4fb5144a2bb6d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,11 +1,11 @@
-image: docker:19.03.12
+image: docker:20.10.9
 
 variables:
   DOCKER_TLS_CERTDIR: "/certs"
-  IMAGE_VER: 4.0.2-1
+  IMAGE_VER: 4.2.3-1
 
 services:
-  - docker:19.03.12-dind
+  - docker:20.10.9-dind
 
 before_script:
   - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
diff --git a/Dockerfile b/Dockerfile
index 3ccb8dca3fd4e98ea1b2244f10a5d0b72e178b11..238a8cbe8dba21a98603102d6f512c12716e3f9a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
-FROM graylog/graylog:4.0.2
+FROM graylog/graylog:4.2.3
 MAINTAINER Andrej Ramašeuski <andrej.ramaseuski@pirati.cz>
 RUN curl -L -o /usr/share/graylog/plugin/graylog-output-syslog-3.3.0.jar https://github.com/wizecore/graylog2-output-syslog/releases/download/3.3.0/graylog-output-syslog-3.3.0.jar