diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 65386f2..4a31552 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,5 @@
 image: java:8-jdk
+image: docker:latest
 
 services:
   - mysql:latest
@@ -17,8 +18,6 @@ stages:
 before_script:
   - echo `pwd` # debug
   - echo "$CI_BUILD_NAME, $CI_BUILD_REF_NAME $CI_BUILD_STAGE" # debug
-  - export JAVA_HOME="/usr/local/java-8-openjdk-amd64"
-  - echo "$JAVA_HOME"
   - export GRADLE_USER_HOME=`pwd`/.gradle
 
 cache:
@@ -29,6 +28,7 @@ cache:
 build:
   stage: build
   script:
+    - docker run java:8-jdk
     - ./gradlew assemble
   artifacts:
     paths: