diff --git a/pyproject.toml b/pyproject.toml
index 9b8c4c9..be2ff00 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ classifiers = [
     "Programming Language :: Python :: 3.13",
 ]
 dependencies = [
-    "holidays>=0.16;python_version>='3.8'",
+    "holidays>=0.59;python_version>='3.9'",
     "pytz>=2022.7.1",
     "python-dateutil",
 ]
diff --git a/requirements.txt b/requirements.txt
index 0bf1637..0b04f08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 #
 #    pip-compile pyproject.toml
 #
-holidays==0.59 ; python_version >= "3.8"
+holidays==0.59 ; python_version >= "3.9"
     # via bdew_datetimes (pyproject.toml)
 python-dateutil==2.9.0.post0
     # via