diff --git a/pyproject.toml b/pyproject.toml
index 54b9761..73b4c51 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "pye3dc==0.10.0",
-    "tzlocal==5.3.1",
+    "tzlocal==5.4.4",
     "jsonargparse==4.42.0",
     "rich-argparse==1.7.2",
     "pydantic==2.13.4",