diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dd40f0e6f43b0286bbcd25e57c9219bbc7b3bb61..94164b31268356ff68c4bc544a810fa3b8497e9d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,7 +42,7 @@ tests (from scratch):
     - ./CI/update_badge.sh > /dev/null
   script:
     - pip install --upgrade pip
-    - pip install numpy
+    - pip install numpy wheel six
     - zypper --non-interactive install binutils libproj-devel gdal-devel
     - zypper --non-interactive install proj geos-devel
     #    - cat requirements.txt | cut -f1 -d"#" | sed '/^\s*$/d' | xargs -L 1 pip install