diff --git a/setup.py b/setup.py
index b1a1aca..38b3ef2 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 
 setup(
     name="LoopDataConverter",
-    install_requires=["dill", "beartype", "numpy", "pandas", "geopandas", "shapely"],
+    install_requires=["dill", "beartype", "numpy", "pandas", "geopandas", "shapely", "validators"],
     python_requires=">=3.9",
     description="Loop GIS data conversion library for LoopStructural and Map2Loop",
     long_description=codecs.open("README.md", "r", "utf-8").read(),