diff --git a/lib/reducers/message-reducer.js b/lib/reducers/message-reducer.js
--- a/lib/reducers/message-reducer.js
+++ b/lib/reducers/message-reducer.js
@@ -27,6 +27,7 @@
   sendTextMessageActionTypes,
   sendMultimediaMessageActionTypes,
   sendReactionMessageActionTypes,
+  sendEditMessageActionTypes,
   saveMessagesActionType,
   processMessagesActionType,
   messageStorePruneActionType,
@@ -878,6 +879,19 @@
       messagesResult.truncationStatuses,
       newThreadInfos,
     );
+  } else if (action.type === sendEditMessageActionTypes.success) {
+    const { newMessageInfos } = action.payload;
+    const truncationStatuses = {};
+    for (const messageInfo of newMessageInfos) {
+      truncationStatuses[messageInfo.threadID] =
+        messageTruncationStatus.UNCHANGED;
+    }
+    return mergeNewMessages(
+      messageStore,
+      newMessageInfos,
+      truncationStatuses,
+      newThreadInfos,
+    );
   } else if (
     action.type === sendTextMessageActionTypes.started ||
     action.type === sendMultimediaMessageActionTypes.started ||