diff --git a/requirements.txt b/requirements.txt
index 4d23dd7..0b0a8ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1 @@
-python-dateutil>=2.6.1
 six>=1.11.0
diff --git a/setup.py b/setup.py
index aecf962..93c5783 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,6 @@
     package_dir={"pyx12lib": "pyx12lib"},
     packages=setuptools.find_packages(),
     install_requires=[
-        "python-dateutil",
         "six",
     ],
     python_requires=">=3.6",