diff --git a/lang/en.json b/lang/en.json
index 91eae17..2de175f 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -104,6 +104,9 @@
   "BOL.ui.defender": "Défenseur",
   "BOL.ui.difficulty": "Difficulty",
   "BOL.ui.spellProperties": "Spell Properties",
+  "BOL.ui.duration": "Duration", 
+  "BOL.ui.spellkeep": "Maintain",
+  "BOL.ui.concentrate": "Concentrate",
   
   "BOL.featureCategory.origins": "Origines",
   "BOL.featureCategory.races": "Races",
diff --git a/lang/fr.json b/lang/fr.json
index 16f6244..1ca978a 100644
--- a/lang/fr.json
+++ b/lang/fr.json
@@ -105,6 +105,9 @@
   "BOL.ui.defender": "Défenseur",
   "BOL.ui.difficulty": "Difficulté",
   "BOL.ui.spellProperties": "Propriétés du Sort",
+  "BOL.ui.duration": "Durée", 
+  "BOL.ui.spellkeep": "Prolongation",
+  "BOL.ui.concentrate": "Concentration",
 
   "BOL.featureCategory.origins": "Origines",
   "BOL.featureCategory.races": "Races",
diff --git a/templates/item/parts/properties/item/spell-properties.hbs b/templates/item/parts/properties/item/spell-properties.hbs
index 47edf1c..684b8be 100644
--- a/templates/item/parts/properties/item/spell-properties.hbs
+++ b/templates/item/parts/properties/item/spell-properties.hbs
@@ -6,6 +6,26 @@
     </div>
 </div>
 
+<div class="form-group">
+    <div class="form-fields center">
+      <label class="property-label">{{localize "BOL.ui.duration"}}</label>
+      <input class="field-value" type="text" name="data.properties.duration" value="{{data.properties.duration}}" data-dtype="String"/>
+    </div>
+</div>
+
+<div class="form-group">
+  <div class="form-fields center">
+      <label class="checkbox">
+          <input class="field-value" type="checkbox" name="data.properties.spellkeep" {{checked data.properties.spellkeep}}> {{localize "BOL.ui.spellkeep"}}
+      </label>
+    </div>
+    <div class="form-fields center">
+      <label class="checkbox">
+          <input class="field-value" type="checkbox" name="data.properties.concentrate" {{checked data.properties.concentrate}}> {{localize "BOL.ui.concentrate"}}
+      </label>
+    </div>
+</div>
+
 <div class="form-group">
     <div class="form-fields center">
       <label class="property-label">{{localize "BOL.ui.mandatoryConditions"}}</label>