diff --git a/src/helpers/flatten.ts b/src/helpers/flatten.ts
index deb3af9..ed54da9 100644
--- a/src/helpers/flatten.ts
+++ b/src/helpers/flatten.ts
@@ -7,8 +7,8 @@ export default function flatten (data, keepArray = false) {  // flatten object:
       result[prop] = cur;
     }
     else if (prop === `${globals.spectrum.spectrum}.${globals.spectrum.dpt}`) {
-      result[prop + '.labels'] = cur.map(e => e[0]);
-      result[prop + '.values'] = cur.map(e => e[1]);
+      result[prop + '.labels'] = cur.map(e => parseFloat(e[0]));
+      result[prop + '.values'] = cur.map(e => parseFloat(e[1]));
     }
     else if (Array.isArray(cur)) {
       if (keepArray) {