diff --git a/webapp/src/views/DeviceAdminView.vue b/webapp/src/views/DeviceAdminView.vue
index 31eadcf..eafcf90 100644
--- a/webapp/src/views/DeviceAdminView.vue
+++ b/webapp/src/views/DeviceAdminView.vue
@@ -202,7 +202,7 @@
                                         min="0"
                                         max="100"
                                         id="inputDisplayContrast"
-                                        v-model="deviceConfigList.display.contrast"
+                                        v-model.number="deviceConfigList.display.contrast"
                                     />
                                 </div>
                             </div>
@@ -239,7 +239,7 @@
                                         min="0"
                                         max="100"
                                         :id="getLedIdFromNumber(index)"
-                                        v-model="ledSetting.brightness"
+                                        v-model.number="ledSetting.brightness"
                                         @change="syncSliders"
                                     />
                                 </div>
diff --git a/webapp/src/views/DtuAdminView.vue b/webapp/src/views/DtuAdminView.vue
index 23d4db7..ebae521 100644
--- a/webapp/src/views/DtuAdminView.vue
+++ b/webapp/src/views/DtuAdminView.vue
@@ -89,7 +89,7 @@
                             <input
                                 type="range"
                                 class="form-control form-range"
-                                v-model="dtuConfigList.cmt_frequency"
+                                v-model.number="dtuConfigList.cmt_frequency"
                                 :min="cmtMinFrequency"
                                 :max="cmtMaxFrequency"
                                 :step="dtuConfigList.cmt_chan_width"