diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 32864401b..218078000 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,11 +1,12 @@
 image:
-  name: docker:latest
+  name: ${DOCKER_PROXY}/docker:latest
   pull_policy: if-not-present
 
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
   MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
   MAVEN_CLI_OPTS: "-s /settings.xml -P nbki --batch-mode"
+  DOCKER_PROXY: "mirror.gcr.io"
 
 stages:
   - build
@@ -18,7 +19,7 @@ cache:
     - z-distr/target/clearing/
 
 build:
-  image: maven:latest
+  image: ${DOCKER_PROXY}/maven:latest
   stage: build
   script:
     - mvn clean package -DskipTests -Pdistributive
diff --git a/clr_test/clearing-all/Dockerfile b/clr_test/clearing-all/Dockerfile
index cc7253cb6..e263597da 100644
--- a/clr_test/clearing-all/Dockerfile
+++ b/clr_test/clearing-all/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:17-slim
+FROM mirror.gcr.io/openjdk:17-slim
 
 ENV CLEARING_HOME="/opt/clearing"
 ENV CLEARING_HOME_BIN="/opt/clearing/bin"
diff --git a/clr_test/docker-compose.yml b/clr_test/docker-compose.yml
index 21befdb43..67ddeabfa 100644
--- a/clr_test/docker-compose.yml
+++ b/clr_test/docker-compose.yml
@@ -1,7 +1,7 @@
 version: "3"
 services:
   db:
-    image: postgres:14.1-alpine
+    image: mirror.gcr.io/postgres:14.1-alpine
     restart: always
     environment:
       - POSTGRES_USER=clearing
@@ -42,7 +42,7 @@ services:
     # restart: always
 
   zookeeper:
-    image: confluentinc/cp-zookeeper:6.2.3.amd64
+    image: mirror.gcr.io/confluentinc/cp-zookeeper:6.2.3.amd64
     container_name: zookeeper
     networks:
       - clearing-net
@@ -54,7 +54,7 @@ services:
       - "22181:2181"
 
   kafka:
-    image: confluentinc/cp-kafka:6.2.3.amd64
+    image: mirror.gcr.io/confluentinc/cp-kafka:6.2.3.amd64
     container_name: kafka
     networks:
       - clearing-net
@@ -73,7 +73,7 @@ services:
       - zookeeper
 
   sftp:
-    image: atmoz/sftp
+    image: mirror.gcr.io/atmoz/sftp
     networks:
       - clearing-net
     volumes: