diff --git a/src/main/java/org/asamk/signal/Main.java b/src/main/java/org/asamk/signal/Main.java
index 2c955753..3b2fbadb 100644
--- a/src/main/java/org/asamk/signal/Main.java
+++ b/src/main/java/org/asamk/signal/Main.java
@@ -899,6 +899,9 @@ public class Main {
         parserDaemon.addArgument("--ignore-attachments")
                 .help("Don’t download attachments of received messages.")
                 .action(Arguments.storeTrue());
+        parserDaemon.addArgument("--json")
+                .help("Output received messages in json format, one json object per line.")
+                .action(Arguments.storeTrue());
 
         try {
             Namespace ns = parser.parseArgs(args);