diff --git a/pyproject.toml b/pyproject.toml
index ed21d3d..eada548 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ name = "tzfpy"
 requires-python = ">=3.8"
 
 [project.optional-dependencies]
-pytz = ["pytz>=2023.3"]
+pytz = ["pytz>=2024.1"]
 
 [project.urls]
 Documentation = "https://github.com/ringsaturn/tzfpy"