diff --git a/matemat/scrape.rb b/matemat/scrape.rb
index dd86bdb..319be17 100644
--- a/matemat/scrape.rb
+++ b/matemat/scrape.rb
@@ -13,7 +13,7 @@ points = []
 data = JSON.parse open("https://#{HOST}/statistics.json", :http_basic_authentication => [USER, PASSWORD]).read()
 points.push({
   series: 'statistics',
-  values: data,
+  values: data.map { |(n, i)| [n, i.to_i] },
 })
 
 data = JSON.parse open("http://#{HOST}/summary.json", :http_basic_authentication => [USER, PASSWORD]).read()