diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a5733cd..2f24c63 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,7 @@ stages:
 variables:
   DOCKER_HOST: tcp://docker:2375/
 
-image: buildtool/build-tools:0.0.23
+image: buildtool/build-tools:${BUILDTOOLS_VERSION}
 
 build:
   stage: build