diff --git a/app/assets/javascripts/app/services/extensionManager.js b/app/assets/javascripts/app/services/extensionManager.js
index b31997fda..e06aa527b 100644
--- a/app/assets/javascripts/app/services/extensionManager.js
+++ b/app/assets/javascripts/app/services/extensionManager.js
@@ -13,7 +13,7 @@ class ExtensionManager {
           ext.encrypted = this.extensionUsesEncryptedData(ext);
 
           for (var action of ext.actions) {
-            if(this.enabledRepeatActionUrls.includes(action.url)) {
+            if(_.includes(this.enabledRepeatActionUrls, action.url)) {
               this.enableRepeatAction(action, ext);
             }
           }
@@ -38,7 +38,7 @@ class ExtensionManager {
   }
 
   extensionUsesEncryptedData(extension) {
-    return !this.decryptedExtensions.includes(extension.url);
+    return !_.includes(this.decryptedExtensions, extension.url);
   }
 
   changeExtensionEncryptionFormat(encrypted, extension) {
@@ -174,7 +174,7 @@ class ExtensionManager {
   }
 
   isRepeatActionEnabled(action) {
-    return this.enabledRepeatActionUrls.includes(action.url);
+    return _.includes(this.enabledRepeatActionUrls, action.url);
   }
 
   disableRepeatAction(action, extension) {
diff --git a/app/assets/javascripts/app/services/modelManager.js b/app/assets/javascripts/app/services/modelManager.js
index 06d2cedd0..3291eb98f 100644
--- a/app/assets/javascripts/app/services/modelManager.js
+++ b/app/assets/javascripts/app/services/modelManager.js
@@ -24,7 +24,7 @@ class ModelManager {
 
   allItemsMatchingTypes(contentTypes) {
     return this.items.filter(function(item){
-      return (contentTypes.includes(item.content_type) || contentTypes.includes("*")) && !item.dummy;
+      return (_.includes(contentTypes, item.content_type) || _.includes(contentTypes, "*")) && !item.dummy;
     })
   }
 
@@ -83,7 +83,7 @@ class ModelManager {
   notifyItemChangeObserversOfModels(models) {
     for(var observer of this.itemChangeObservers) {
       var relevantItems = models.filter(function(item){
-        return observer.content_types.includes(item.content_type) || observer.content_types.includes("*");
+        return _.includes(observer.content_types, item.content_type) || _.includes(observer.content_types, "*");
       });
 
       if(relevantItems.length > 0) {