diff --git a/plugins/discourse-details/assets/javascripts/initializers/apply-details.js.es6 b/plugins/discourse-details/assets/javascripts/initializers/apply-details.js.es6
index b3f58c7bc42..f523ae7b903 100644
--- a/plugins/discourse-details/assets/javascripts/initializers/apply-details.js.es6
+++ b/plugins/discourse-details/assets/javascripts/initializers/apply-details.js.es6
@@ -1,4 +1,5 @@
 import { withPluginApi } from 'discourse/lib/plugin-api';
+import ComposerController from 'discourse/controllers/composer';
 
 function initializeDetails(api) {
   api.decorateCooked($elem => $("details", $elem).details());
@@ -11,8 +12,6 @@ function initializeDetails(api) {
     };
   });
 
-  const ComposerController = api.container.lookup("controller:composer");
-
   ComposerController.reopen({
     actions: {
       insertDetails() {
diff --git a/plugins/poll/assets/javascripts/initializers/add-poll-ui-builder.js.es6 b/plugins/poll/assets/javascripts/initializers/add-poll-ui-builder.js.es6
index a5f80d08ddc..61fb332cb99 100644
--- a/plugins/poll/assets/javascripts/initializers/add-poll-ui-builder.js.es6
+++ b/plugins/poll/assets/javascripts/initializers/add-poll-ui-builder.js.es6
@@ -1,9 +1,8 @@
 import { withPluginApi } from 'discourse/lib/plugin-api';
 import showModal from 'discourse/lib/show-modal';
+import ComposerController from 'discourse/controllers/composer';
 
 function initializePollUIBuilder(api) {
-  const ComposerController = api.container.lookup("controller:composer");
-
   ComposerController.reopen({
     actions: {
       showPollBuilder() {