diff --git a/setup.py b/setup.py
index 0dda557..b304028 100644
--- a/setup.py
+++ b/setup.py
@@ -37,6 +37,7 @@ def find_version(*file_paths):
     "numpy",
     "pandas",
     "tensorflow",
+    "lxml",
     "validate_version_code",
     "codacy-coverage",
     "pytest_readme",