diff --git a/main.py b/main.py
index 15cad1d..50fc468 100644
--- a/main.py
+++ b/main.py
@@ -101,10 +101,10 @@ def msg_shell(update: Update, context: CallbackContext) -> None:
 
         buf = '[stdout] ' + result.stdout.decode('utf-8')
         buf += '\n[stderr] ' + result.stderr.decode('utf-8')
-        reply(update, buf)
+        reply(update, escape(buf))
     except Exception as e:
         logging.exception(str(e))
-        reply(update, 'exception: ' + str(e))
+        reply(update, 'exception: ' + escape(str(e)))
 
 
 def msg_spawn(update: Update, context: CallbackContext) -> None:
@@ -113,7 +113,7 @@ def msg_spawn(update: Update, context: CallbackContext) -> None:
         os.spawnlp(os.P_NOWAIT, argv[0], *argv)
     except Exception as e:
         logging.exception(str(e))
-        reply(update, 'exception: ' + str(e))
+        reply(update, 'exception: ' + escape(str(e)))
 
 
 def msg_generation(update: Update, context: CallbackContext) -> None: