diff --git a/erpnext/regional/report/gstr_1/gstr_1.js b/erpnext/regional/report/gstr_1/gstr_1.js
index ce559218cb..091dfd1253 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.js
+++ b/erpnext/regional/report/gstr_1/gstr_1.js
@@ -55,14 +55,25 @@ frappe.query_reports["GSTR-1"] = {
 		report.page.add_inner_button(__("Download as JSON"), function () {
 			var filters = report.get_values();
 
-			const args = {
-				cmd: 'erpnext.regional.report.gstr_1.gstr_1.get_json',
-				data: report.data,
-				report_name: report.report_name,
-				filters: filters
-			};
-
-			open_url_post(frappe.request.url, args);
+			frappe.call({
+				method: 'erpnext.regional.report.gstr_1.gstr_1.get_json',
+				args: {
+					data: report.data,
+					report_name: report.report_name,
+					filters: filters
+				},
+				callback: function(r) {
+					if (r.message) {
+						const args = {
+							cmd: 'erpnext.regional.report.gstr_1.gstr_1.download_json_file',
+							data: r.message.data,
+							report_name: r.message.report_name,
+							report_type: r.message.report_type
+						};
+						open_url_post(frappe.request.url, args);
+					}
+				}
+			})
 		});
 	}
 }
diff --git a/erpnext/regional/report/gstr_1/gstr_1.py b/erpnext/regional/report/gstr_1/gstr_1.py
index 090616b077..4f9cc7ff7a 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.py
+++ b/erpnext/regional/report/gstr_1/gstr_1.py
@@ -532,16 +532,9 @@ class Gstr1Report(object):
 		self.columns = self.invoice_columns + self.tax_columns + self.other_columns
 
 @frappe.whitelist()
-def get_json():
-	data = frappe._dict(frappe.local.form_dict)
-
-	del data["cmd"]
-	if "csrf_token" in data:
-		del data["csrf_token"]
-
-	filters = json.loads(data["filters"])
-	report_data = json.loads(data["data"])
-	report_name = data["report_name"]
+def get_json(filters, report_name, data):
+	filters = json.loads(filters)
+	report_data = json.loads(data)
 	gstin = get_company_gstin_number(filters["company"])
 
 	fp = "%02d%s" % (getdate(filters["to_date"]).month, getdate(filters["to_date"]).year)
@@ -575,7 +568,11 @@ def get_json():
 		out = get_export_json(res)
 		gst_json["exp"] = out
 
-	download_json_file(report_name, filters["type_of_business"], gst_json)
+	return {
+		'report_name': report_name,
+		'report_type': filters['type_of_business'],
+		'data': gst_json
+	}
 
 def get_b2b_json(res, gstin):
 	inv_type, out = {"Registered Regular": "R", "Deemed Export": "DE", "URD": "URD", "SEZ": "SEZ"}, []
@@ -722,11 +719,15 @@ def get_company_gstin_number(company):
 	if gstin:
 		return gstin[0]["gstin"]
 	else:
-		frappe.throw(_("Please set valid GSTIN No. in Company Address"))
+		frappe.throw(_("Please set valid GSTIN No. in Company Address for company {0}".format(
+			frappe.bold(company)
+		)))
 
-def download_json_file(filename, report_type, data):
+@frappe.whitelist()
+def download_json_file():
 	''' download json content in a file '''
-	frappe.response['filename'] = frappe.scrub("{0} {1}".format(filename, report_type)) + '.json'
-	frappe.response['filecontent'] = json.dumps(data)
+	data = frappe._dict(frappe.local.form_dict)
+	frappe.response['filename'] = frappe.scrub("{0} {1}".format(data['report_name'], data['report_type'])) + '.json'
+	frappe.response['filecontent'] = data['data']
 	frappe.response['content_type'] = 'application/json'
 	frappe.response['type'] = 'download'