diff --git a/app/actions/messages.js b/app/actions/messages.js
deleted file mode 100644
index 9f40809c..00000000
--- a/app/actions/messages.js
+++ /dev/null
@@ -1,8 +0,0 @@
-import * as types from './actionsTypes';
-
-export function replyBroadcast(message) {
-	return {
-		type: types.MESSAGES.REPLY_BROADCAST,
-		message
-	};
-}
diff --git a/app/actions/messages.ts b/app/actions/messages.ts
new file mode 100644
index 00000000..eb0383ab
--- /dev/null
+++ b/app/actions/messages.ts
@@ -0,0 +1,16 @@
+import { Action } from 'redux';
+
+import { MESSAGES } from './actionsTypes';
+
+type IMessage = Record<string, string>;
+
+interface IReplyBroadcast extends Action {
+	message: IMessage;
+}
+
+export function replyBroadcast(message: IMessage): IReplyBroadcast {
+	return {
+		type: MESSAGES.REPLY_BROADCAST,
+		message
+	};
+}