diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1a6e070..58c93cb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,6 +13,8 @@
 #
 # For more information, see: https://docs.gitlab.com/ee/ci/yaml/index.html#stages
 
+image: debian:stable
+
 stages:          # List of stages for jobs, and their order of execution
   - build
   - test
@@ -23,7 +25,8 @@ build-job:       # This job runs in the build stage, which runs first.
   tags:
     - linux
   before_script:
-    - apk --no-cache add cmake libgtk2.0-dev
+    - apt update
+    - apt install -y cmake libgtk2.0-dev
   script:
     - echo "Configuring"
     - cmake -B build .