diff --git a/.gitlab/ci/lint.gitlab-ci.yml b/.gitlab/ci/lint.gitlab-ci.yml
index 7a8fbf1fb..6e33af408 100644
--- a/.gitlab/ci/lint.gitlab-ci.yml
+++ b/.gitlab/ci/lint.gitlab-ci.yml
@@ -1,3 +1,6 @@
+.install_tox: &install_tox
+    - pip3 install -U tox --break-system-packages
+
 ########################################
 # LINTER
 ########################################
@@ -8,6 +11,8 @@ lint39:
   image: "before-install"
   needs: []
   allow_failure: true
+  before_script:
+    - *install_tox
   script:
     - tox -e py39-lint
 
@@ -15,6 +20,8 @@ invalidcode39:
   stage: lint
   image: "before-install"
   needs: []
+  before_script:
+    - *install_tox
   script:
     - tox -e py39-invalidcode
 
@@ -22,6 +29,8 @@ mypy:
   stage: lint
   image: "before-install"
   needs: []
+  before_script:
+    - *install_tox
   script:
     - tox -e py39-mypy
 
@@ -29,6 +38,8 @@ black:
   stage: lint
   image: "before-install"
   needs: []
+  before_script:
+    - *install_tox
   before_script:
     - apt-get update -y && apt-get install git hub -y
     - git config --global user.email "yunohost@yunohost.org"