diff --git a/js/models/conversations.js b/js/models/conversations.js
index 1d675e4fb..0a7d17081 100644
--- a/js/models/conversations.js
+++ b/js/models/conversations.js
@@ -203,9 +203,7 @@
 
       // Go through our messages and find the one that we need to update
       const messages = this.messageCollection.models.filter(m => m.get('sent_at') === timestamp);
-      for (const message of messages) {
-        await message.setCalculatingPoW();
-      }
+      await Promise.all(messages.map(m => m.setCalculatingPoW()))
     },
 
     addSingleMessage(message, setToExpire = true) {