diff --git a/package.json b/package.json
index 5a849f9..7f13729 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-choropleth",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Choropleth Map for Vue.js",
   "homepage": "https://github.com/voluntadpear/ChoroplethMap",
   "bugs": "https://github.com/voluntadpear/ChoroplethMap/issues",
diff --git a/src/components/ChoroplethLayer.vue b/src/components/ChoroplethLayer.vue
index ae8ca9a..398a3f5 100644
--- a/src/components/ChoroplethLayer.vue
+++ b/src/components/ChoroplethLayer.vue
@@ -6,7 +6,7 @@
 </template>
 <script>
 import Vue2Leaflet from "vue2-leaflet"
-import { getMin, getMax, normalizeValue, getColor } from "../util"
+import { getMin, getMax, normalizeValue, getColor, validNumber } from "../util"
 
 function mouseover({ target }) {
   target.setStyle({
@@ -80,9 +80,8 @@ export default {
               weight: 2
             }
           }
-          // let canH = dpto.cantidad_h
-          let valueParam = item[this.value.key]
-          if (!Number(valueParam)) {
+          let valueParam = Number(item[this.value.key])
+          if (!validNumber(valueParam)) {
             return {
               color: "white",
               weight: 2
diff --git a/src/util.js b/src/util.js
index cfce6f2..6979da0 100644
--- a/src/util.js
+++ b/src/util.js
@@ -1,15 +1,19 @@
 import chroma from "chroma-js"
 
+export const validNumber = num => !(isNaN(num) ||
+num == null ||
+num == undefined)
+
 export const getMin = (array, key) =>
-  Math.min(...array.filter(x => Number(x[key])).map(x => Number(x[key])))
+  Math.min(...array.filter(x => validNumber(x[key])).map(x => Number(x[key])))
 
 export const getMax = (array, key) =>
-  Math.max(...array.filter(x => Number(x[key])).map(x => Number(x[key])))
+  Math.max(...array.filter(x => validNumber(x[key])).map(x => Number(x[key])))
 
 export const normalizeValue = (value, min, max) => (value - min) / (max - min)
 
-export const getColor = (param, colorScale, min, max) =>
-  chroma
+export const getColor = (param, colorScale, min, max) => 
+    chroma
     .scale(colorScale)
     .mode("lch")(normalizeValue(param, min, max))
     .hex()