diff --git a/napi b/napi
index b7b0654..1231f76 100755
--- a/napi
+++ b/napi
@@ -83,9 +83,10 @@ for movie_filename in args:
 		input_filename, # input file
 	]
 	
-	with open(subtitle_filename, "w") as subtitle_file:
-		process = subprocess.Popen(executed, stdout=subtitle_file)
-		result = process.wait()
+	with open(os.devnull, 'w') as error_file:
+		with open(subtitle_filename, "w") as subtitle_file:
+			process = subprocess.Popen(executed, stdout=subtitle_file, stderr=error_file)
+			result = process.wait()
 
 	if result != 0:
 		print "%s: 7zip returned non-zero code: %s" % (movie_filename, subtitle_filename)