diff --git a/lib/network/modules/ConfigurationSystem.js b/lib/network/modules/ConfigurationSystem.js
index c2e57e10..b48d5124 100644
--- a/lib/network/modules/ConfigurationSystem.js
+++ b/lib/network/modules/ConfigurationSystem.js
@@ -347,6 +347,29 @@ class ConfigurationSystem {
     this._makeItem(path, label, checkbox);
   }
 
+  /**
+   * make a text input field for string options.
+   * @param defaultValue
+   * @param value
+   * @param path
+   * @private
+   */
+  _makeTextInput(defaultValue, value, path) {
+    var checkbox = document.createElement('input');
+    checkbox.type = 'text';
+    checkbox.className = 'vis-network-configuration text';
+    checkbox.value = value;
+    if (value !== defaultValue) {
+      this.changedOptions.push({path:path, value:value});
+    }
+
+    let me = this;
+    checkbox.onchange = function() {me._update(this.value, path)};
+
+    let label = this._makeLabel(path[path.length-1], path);
+    this._makeItem(path, label, checkbox);
+  }
+
 
   /**
    * make a color field with a color picker for color fields
@@ -418,7 +441,7 @@ class ConfigurationSystem {
           this._handleArray(item, value, newPath);
         }
         else if (typeof item === 'string') {
-          this._handleString(item, value, newPath);
+          this._makeTextInput(item, value, newPath);
         }
         else if (typeof item === 'boolean') {
           this._makeCheckbox(item, value, newPath);
diff --git a/lib/network/modules/Validator.js b/lib/network/modules/Validator.js
index 1404e4da..b2851dc3 100644
--- a/lib/network/modules/Validator.js
+++ b/lib/network/modules/Validator.js
@@ -141,7 +141,10 @@ class Validator {
         return 'date';
       }
       if (object.nodeType !== undefined) {
-        return 'dom'
+        return 'dom';
+      }
+      if (object._isAMomentObject === true) {
+        return 'moment';
       }
       return 'object';
     }