diff --git a/index.html b/index.html
index 5e9a69c8..d6376680 100644
--- a/index.html
+++ b/index.html
@@ -76,7 +76,7 @@
               <a class="dropdown-item" onclick="switchRollsType(this, 'binomial')">Binomial</a>
             </div>
           </div>
-          <input type="text" class="form-control exact d-none rounded-right" onchange="updateRollsField(this)" value="1">
+          <input type="text" class="form-control exact d-none rounded-right" onchange="updateRollsField(this)">
           <span class="input-group-text rounded-0 range d-none">Min</span>
           <input type="text" class="form-control range min d-none" value="1" onchange="updateRollsField(this)">
           <span class="input-group-text rounded-0 range d-none">Max</span>
@@ -86,6 +86,26 @@
           <span class="input-group-text rounded-0 binomial d-none">p</span>
           <input type="text" class="form-control binomial p d-none rounded-right" value="0.5" onchange="updateRollsField(this)">
         </div>
+        <div class="input-group mt-3 bonus-rolls" data-type="exact">
+          <div class="input-group-prepend">
+            <span class="input-group-text">Bonus Rolls</span>
+            <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown"></button>
+            <div class="dropdown-menu">
+              <a class="dropdown-item" onclick="switchBonusRollsType(this, 'exact')">Exact</a>
+              <a class="dropdown-item" onclick="switchBonusRollsType(this, 'range')">Range</a>
+              <a class="dropdown-item" onclick="switchBonusRollsType(this, 'binomial')">Binomial</a>
+            </div>
+          </div>
+          <input type="text" class="form-control exact d-none rounded-right" onchange="updateBonusRollsField(this)">
+          <span class="input-group-text rounded-0 range d-none">Min</span>
+          <input type="text" class="form-control range min d-none" value="1" onchange="updateBonusRollsField(this)">
+          <span class="input-group-text rounded-0 range d-none">Max</span>
+          <input type="text" class="form-control range max d-none rounded-right" value="2" onchange="updateBonusRollsField(this)">
+          <span class="input-group-text rounded-0 binomial d-none">n</span>
+          <input type="text" class="form-control binomial n d-none" value="1" onchange="updateBonusRollsField(this)">
+          <span class="input-group-text rounded-0 binomial d-none">p</span>
+          <input type="text" class="form-control binomial p d-none rounded-right" value="0.5" onchange="updateBonusRollsField(this)">
+        </div>
       </div>
     </div>
     <div id="entryTemplate" class="card mt-3 entry">
diff --git a/script.js b/script.js
index 543cac15..dd93a864 100644
--- a/script.js
+++ b/script.js
@@ -89,6 +89,22 @@ function updateRollsField(el) {
   invalidated();
 }
 
+function switchBonusRollsType(el, type) {
+  $(el).closest('.bonus-rolls').attr('data-type', type);
+  updateBonusRollsField(el);
+}
+
+function updateBonusRollsField(el) {
+  let type = $(el).closest('.bonus-rolls').attr('data-type');
+  let data = getRangeField($(el).closest('.bonus-rolls'), type);
+  if (type ==='exact' && isNaN(data)) {
+    delete getPool(el).bonus_rolls;
+  } else {
+    getPool(el).bonus_rolls = data;
+  }
+  invalidated();
+}
+
 function updateEntryType(el) {
   let entry = getEntry(el);
   entry.type = $(el).val();
@@ -162,6 +178,9 @@ function generateStructure() {
     $pool.removeAttr('id').attr('data-index', i);
 
     // Rolls
+    if (!pool.rolls) {
+      pool.rolls = 1;
+    }
     let $rolls = $pool.find('.rolls');
     if (typeof pool.rolls === 'object') {
       if (pool.rolls.type && pool.rolls.type.match(/(minecraft:)?binomial/)) {
@@ -181,6 +200,30 @@ function generateStructure() {
       $rolls.find('.exact').val(pool.rolls);
     }
 
+    // Bonus Rolls
+    let $bonus_rolls = $pool.find('.bonus-rolls');
+    if (pool.bonus_rolls) {
+      if (typeof pool.bonus_rolls === 'object') {
+        if (pool.bonus_rolls.type && pool.bonus_rolls.type.match(/(minecraft:)?binomial/)) {
+          $bonus_rolls.attr('data-type', 'binomial');
+          $bonus_rolls.find('.binomial').removeClass('d-none');
+          $bonus_rolls.find('.binomial.n').val(pool.bonus_rolls.n);
+          $bonus_rolls.find('.binomial.p').val(pool.bonus_rolls.p);
+        } else {
+          $bonus_rolls.attr('data-type', 'range');
+          $bonus_rolls.find('.range').removeClass('d-none');
+          $bonus_rolls.find('.range.min').val(pool.bonus_rolls.min);
+          $bonus_rolls.find('.range.max').val(pool.bonus_rolls.max);
+        }
+      } else {
+        $bonus_rolls.attr('data-type', 'exact');
+        $bonus_rolls.find('.exact').removeClass('d-none');
+        $bonus_rolls.find('.exact').val(pool.bonus_rolls);
+      }
+    } else {
+      $bonus_rolls.find('.exact').removeClass('d-none');
+    }
+
     // Entries
     for (let j = 0; j < pool.entries.length; j += 1) {
       let entry = pool.entries[j];