diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7b3a6b4..df9975d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ py38:
   stage: test
   image: python:3.8-alpine
   before_script:
-    - apk add --no-cache libmagic
+    - apk add --no-cache libmagic libxml2-dev libxslt-dev
     - pip install tox --no-cache-dir
   script: tox -e py38
 
@@ -14,7 +14,7 @@ py39:
   stage: test
   image: python:3.9-alpine
   before_script:
-    - apk add --no-cache libmagic
+    - apk add --no-cache libmagic libxml2-dev libxslt-dev
     - pip install tox --no-cache-dir
   script: tox -e py39