diff --git a/terrarium/bi_ci/pyproject.toml b/terrarium/bi_ci/pyproject.toml
index 009371996..c56522bd7 100644
--- a/terrarium/bi_ci/pyproject.toml
+++ b/terrarium/bi_ci/pyproject.toml
@@ -47,6 +47,7 @@ python = ">=3.10, <3.12"
 tomlkit = ">=0.11.8"
 clize = ">=5.0.0"
 poetry = ">=1.5.0"
+pyyaml = ">=6.0.1"
 
 [tool.poetry.scripts]
 detect-affected-packages = "bi_ci.detect_affected_packages:main"