diff --git a/js/plot.js b/js/plot.js
index 770383d..ce63e58 100644
--- a/js/plot.js
+++ b/js/plot.js
@@ -2,15 +2,13 @@ window.onload = function() {
     var required = [], paid = [];
     var today = new Date(),
     year = 1900 + today.getYear(),
-    month = today.getMonth();
+    month = today.getMonth() + 1;
     for(i = 0; i < 12; ++i) {
 	var xhr = new XMLHttpRequest();
 	xhr.open("GET", 'https://kasownik.hackerspace.pl/api/month/' + year + '/' + month + '.json', false);
 	xhr.send();
 	var res = JSON.parse(xhr.response).content,
-	date = new Date();
-	date.setYear(year);
-	date.setMonth(month);
+	date = new Date(year, month, 1);
 	required.unshift({ x: date.getTime() / 1000, y: res.required });
 	paid.unshift({ x: date.getTime() / 1000, y: res.paid });
 	month -= 1;