diff --git a/pyproject.toml b/pyproject.toml
index afa19831..52d04319 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,8 @@ dependencies = [
   "cellpylib==2.4.0",
   "sympy>=1.13.1",
   "magiccube==0.3.0",
-  "pyfiglet==1.0.2"
+  "pyfiglet==1.0.2",
+  "pytz>=2024.1"
 ]
 classifiers = [
   "Programming Language :: Python :: 3",