diff --git a/pyproject.toml b/pyproject.toml
index 096113b..cb760f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ readme = "README.md"
 
 [dependency-groups]
 dev = [
+    "freezegun>=1.5.1",
     "pytest>=8.3.5",
     "pytest-cov>=6.1.1",
     "ruff<1.0.0,>=0.6.9",