diff --git a/ember-basic-dropdown/blueprints/ember-basic-dropdown/index.js b/ember-basic-dropdown/blueprints/ember-basic-dropdown/index.js
index 16bb5cc8..d8e9217d 100644
--- a/ember-basic-dropdown/blueprints/ember-basic-dropdown/index.js
+++ b/ember-basic-dropdown/blueprints/ember-basic-dropdown/index.js
@@ -14,6 +14,7 @@ module.exports = {
 
   afterInstall() {
     let dependencies = this.project.dependencies();
+    const promises = [];
     let skipStyleImport = false;
 
     if ('ember-power-select' in dependencies) {
@@ -38,7 +39,7 @@ module.exports = {
         }
         if (fs.existsSync(file)) {
           this.ui.writeLine(`Added import statement to ${file}`);
-          this.insertIntoFile(file, importStatement, {});
+          promises.push(this.insertIntoFile(file, importStatement, {}));
         } else {
           fs.writeFileSync(file, importStatement);
           this.ui.writeLine(`Created ${file}`);
@@ -50,9 +51,11 @@ module.exports = {
         }
         if (fs.existsSync(file)) {
           this.ui.writeLine(`Added import statement to ${file}`);
-          this.insertIntoFile(file, "import 'ember-basic-dropdown/styles';", {
-            after: "config/environment';" + EOL,
-          });
+          promises.push(
+            this.insertIntoFile(file, "import 'ember-basic-dropdown/styles';", {
+              after: "config/environment';" + EOL,
+            }),
+          );
         }
       }
     }
@@ -61,11 +64,15 @@ module.exports = {
     let applicationFile = path.join(templatePath, `application.hbs`);
     if (fs.existsSync(applicationFile)) {
       this.ui.writeLine(`Added wormhole statement to ${applicationFile}`);
-      this.insertIntoFile(
-        applicationFile,
-        `${EOL}<BasicDropdownWormhole />`,
-        {},
+      promises.push(
+        this.insertIntoFile(
+          applicationFile,
+          `${EOL}<BasicDropdownWormhole />`,
+          {},
+        ),
       );
     }
+
+    return Promise.all(promises);
   },
 };