diff --git a/pyproject.toml b/pyproject.toml
index b27883e0..f0633a22 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,7 +103,7 @@ setuptools = ">= 47.0.0"
 # we do not relaly care for exact versions, as long as they have a stable CLI and craft usable virtual-environments
 pip = ">=23.0"
 pipenv = ">=2023.11.5"
-poetry = "^1.7"
+poetry = ">=1.7,<3.0"
 pdm = "^2.11"
 uv = "0.6.14"  # keep pinned to exact version, until a v1.0.0 is released