diff --git a/pyproject.toml b/pyproject.toml
index 3fe13c3..106a431 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ black = ">=26.3.1"
 isort = "^5.13.2"
 mypy = "^1.8.0"
 pytest-cov = "^5.0.0"
-backoff = "^1.2.1"
+backoff = ">=1.2.1,<3.0.0"
 ruff = "^0.11.10"
 import-linter = "^2.3.0"