diff --git a/.gitlab-ci/images/alpine/Dockerfile b/.gitlab-ci/images/alpine/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..93c05976222f7128b4e4aab9d36c952f4139ddc2
--- /dev/null
+++ b/.gitlab-ci/images/alpine/Dockerfile
@@ -0,0 +1,2 @@
+FROM alpine:latest
+RUN apk add curl jq
\ No newline at end of file
diff --git a/.gitlab-ci/master_coverage/.gitlab-ci.yml b/.gitlab-ci/master_coverage/.gitlab-ci.yml
index 9648398015708ffb8391bbb239f884ddbc9fcb10..3e0da4d94ff90f0b116625623d673e521592eba5 100644
--- a/.gitlab-ci/master_coverage/.gitlab-ci.yml
+++ b/.gitlab-ci/master_coverage/.gitlab-ci.yml
@@ -4,10 +4,8 @@ include:
 
 pages:
   stage: build
-  image: alpine
+  image: gricad-registry.univ-grenoble-alpes.fr/mathdoc/ptfs/ptf-app-ptf/alpine
   script:
-   - apk add curl
-   - apk add jq
    - .gitlab-ci/master_coverage/get_coverage.sh
    - mkdir -p public
    - mv coverage_html public/coverage