diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1ffea09..58afd10 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,7 +23,7 @@ test:
   stage: test
   needs: []
   before_script:
-    - pacman -Syu --needed --noconfirm make python sequoia-sq python-coverage python-pytest
+    - pacman -Syu --needed --noconfirm make python sequoia-sq python-coverage python-pytest python-tomli
   script:
     - make test
   only:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 47e4aa9..0f4db1a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -33,6 +33,7 @@ and develop this project:
 * python-coverage
 * python-isort
 * python-pytest
+* python-tomli
 * flake8
 * mypy