diff --git a/assets/calc.js b/assets/calc.js
index 5c471c3..dfec264 100644
--- a/assets/calc.js
+++ b/assets/calc.js
@@ -43,7 +43,13 @@ const prices = {
     vps: {
         storage: storage_price.map(x => x * 1.1297),
         cpu: [6.146, 7.687, 9.218, 10.749],
-        ram: [1.646, 2.057, 2.468, 2.879]
+        ram: [1.646, 2.057, 2.468, 2.879],
+        options: {
+            ip4: {
+                basePrice: 4.393,
+                factor: 1.097
+            }
+        }
     }
 };
 
@@ -210,7 +216,7 @@ $('#vps_stockage_source')
 $('#vps_cpu_source')
     .slider({
         showThumbTooltip: true,
-        restrictedLabels: [0, 1, 2, 4, 8, 16, 32, 48, 64],
+        restrictedLabels: [0, 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 64],
         min: 0,
         max: 64,
         step: 1,
@@ -225,7 +231,7 @@ $('#vps_cpu_source')
 $('#vps_ram_source')
     .slider({
         showThumbTooltip: true,
-        restrictedLabels: [0, 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128],
+        restrictedLabels: [0, 1, 2, 4, 8, 12, 16, 24, 32, 48, 64, 96, 128],
         min: 0,
         max: 128,
         step: 1,
@@ -250,6 +256,7 @@ function updatePrice() {
     const vpsPriceStorage = $('#vps_stockage_source').slider('get value');
     const vpsPriceCpu = $('#vps_cpu_source').slider('get value');
     const vpsPriceRam = $('#vps_ram_source').slider('get value');
+    const cbVpsIp4 = $('.ui.toggle.checkbox.vps_opt_ip4').checkbox('is checked');
 
     const cbNcLxc = $('.ui.toggle.checkbox.nc_opt_lxc').checkbox('is checked');
     const cbNcDedicated = $('.ui.toggle.checkbox.nc_opt_decicated').checkbox('is checked');
@@ -311,6 +318,7 @@ function updatePrice() {
         let vpsPrice = vpsPriceStorage * prices.vps.storage[i]
             + vpsPriceCpu * prices.vps.cpu[i]
             + vpsPriceRam * prices.vps.ram[i];
+        if (cbVpsIp4) vpsPrice = (vpsPrice + prices.vps.options.ip4.basePrice) * prices.vps.options.ip4.factor;
 
         let totalPrice = ncPrice + whPrice + mailPrice + vpsPrice;
 
diff --git a/tarifs.php b/tarifs.php
index dff5caf..5a12ccd 100644
--- a/tarifs.php
+++ b/tarifs.php
@@ -429,6 +429,12 @@ $currentPage = $pages["tarifs"];
                     <p>Volume de mémoire vive.</p>
                     <div class="ui labeled ticked slider grey" id="vps_ram_source"></div>
 
+                    <h5><i class="icon ethernet"></i>Options</h5>
+                    <p></p>
+                    <div class="ui toggle checkbox vps_opt_ip4">
+                        <input type="checkbox" name="vps_opt_ip4" id="vps_opt_ip4">
+                        <label for="vps_opt_ip4"><strong>IPv4</strong>: Une adresse IPv4 publique dédiée (plus sur demande).</label>
+                    </div>
                 </div>
             </div>
         </div>