diff --git a/lib/tfw/components/pipe_io_event_handler.py b/lib/tfw/components/pipe_io_event_handler.py
index d610f4f..7604787 100644
--- a/lib/tfw/components/pipe_io_event_handler.py
+++ b/lib/tfw/components/pipe_io_event_handler.py
@@ -23,8 +23,12 @@ class PipeIOEventHandler(EventHandlerBase):
         self._pipe_io_server.stop()
 
     def handle_event(self, message):
-        json_bytes = dumps(message).encode()
-        self._pipe_io_server.send_message(json_bytes)
+        try:
+            json_bytes = dumps(message).encode()
+            self._pipe_io_server.send_message(json_bytes)
+        except TypeError:
+            LOG.error("Message %s not JSON serializable! Ignoring...", message)
+
 
 
 class JSONProxyPipeIOServer(PipeIOServer):