diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e3924a5f..b437edde 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,7 +4,7 @@ build_job:
   stage: build
 
   before_script:
-    - apk update && apk add brotli curl grep
+    - apk update && apk add brotli curl grep xmlstarlet
 
   script:
     - sh src/script.sh