diff --git a/main.js b/main.js
index ab0762e1..118bc620 100644
--- a/main.js
+++ b/main.js
@@ -232,7 +232,7 @@ function applyDefaultBiomesSystem() {
   const color = ["#53679f","#fbe79f","#b5b887","#d2d082","#c8d68f","#b6d95d","#29bc56","#7dcb35","#45b348","#4b6b32","#96784b","#d5e7eb"];
   
   const i = new Uint8Array(d3.range(0, name.length));
-  const habitability = new Uint8Array([0,2,5,15,25,50,100,80,90,10,2,0]);
+  const habitability = new Uint16Array([0,2,5,15,25,50,100,80,90,10,2,0]);
   const iconsDensity = new Uint8Array([0,3,2,120,120,120,120,150,150,100,5,0]);
   const icons = [{},{dune:1},{dune:1},{acacia:1, grass:9},{grass:1},{acacia:1, palm:1},{deciduous:1},{acacia:7, palm:2, deciduous:1},{deciduous:7, swamp:3},{conifer:1},{grass:1},{}];
   const cost = new Uint8Array([10,200,150,60,50,70,70,80,90,80,100,255]); // biome movement cost
diff --git a/modules/ui/biomes-editor.js b/modules/ui/biomes-editor.js
index 17c4a092..e743ae13 100644
--- a/modules/ui/biomes-editor.js
+++ b/modules/ui/biomes-editor.js
@@ -70,7 +70,7 @@ function editBiomes() {
         <input data-tip="Biome color. Click to change" class="stateColor" type="color" value="${b.color[i]}">
         <input data-tip="Biome name. Click and type to change" class="biomeName" value="${b.name[i]}" autocorrect="off" spellcheck="false">
         <span data-tip="Biome habitability percent">%</span>
-        <input data-tip="Biome habitability percent. Click and set new value to change" type="number" min=0 max=999 step=1 class="biomeHabitability" value=${b.habitability[i]}>
+        <input data-tip="Biome habitability percent. Click and set new value to change" type="number" min=0 max=9999 step=1 class="biomeHabitability" value=${b.habitability[i]}>
         <span data-tip="Cells count" class="icon-check-empty"></span>
         <div data-tip="Cells count" class="biomeCells">${b.cells[i]}</div>
         <span data-tip="Biome area" style="padding-right: 4px" class="icon-map-o"></span>
@@ -140,7 +140,7 @@ function editBiomes() {
     recalculatePopulation();
     refreshBiomesEditor();
   }
- 
+
   function togglePercentageMode() {
     if (body.dataset.type === "absolute") {
       body.dataset.type = "percentage";