diff --git a/church/install.py b/church/install.py
new file mode 100644
index 0000000..39d6a0f
--- /dev/null
+++ b/church/install.py
@@ -0,0 +1,17 @@
+import frappe
+
+
+def before_install():
+	# Ensure ERPNext is installed
+	if "erpnext" not in frappe.get_installed_apps():
+		raise FileNotFoundError(
+			f"ERPNext must be installed before installing this app."
+		)
+
+
+def after_install():
+	# Remove non-biblical Genders
+	genders = frappe.db.get_all("Gender")
+	for gender in genders:
+		if gender.name not in ["Male", "Female", "Unknown"]:
+			frappe.delete_doc("Gender", gender.name, force=True)