diff --git a/README.md b/README.md
index 0bdc076..d406c90 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,8 @@ App to hold regional code for Germany, built on top of ERPNext.
 - List of religios denominations ("Konfessionen")
 - List of German health insurance providers
 
+    Requires [HRMS](https://github.com/frappe/hrms) to be installed first.
+
 ## Installation
 
 ### On Frappe Cloud
diff --git a/erpnext_germany/install.py b/erpnext_germany/install.py
index 82e2707..f1af710 100644
--- a/erpnext_germany/install.py
+++ b/erpnext_germany/install.py
@@ -17,6 +17,9 @@ def import_data():
 		("Religious Denomination", "religious_denomination.csv"),
 		("Employee Health Insurance", "employee_health_insurance.csv"),
 	):
+		if not frappe.db.exists("DocType", doctype):
+			continue
+
 		path = frappe.get_app_path("erpnext_germany", "data", filename)
 		import_csv(doctype, path)