diff --git a/napi b/napi
index 1c7bf48..0d722bb 100755
--- a/napi
+++ b/napi
@@ -21,6 +21,7 @@ import urllib2
 import xml.etree.ElementTree as ET
 
 import base64
+import subprocess
 
 base_url = "http://napiprojekt.pl/api/api-napiprojekt3.php"
 password = "iBlm8NTigvru0Jr0"
@@ -56,7 +57,20 @@ def download_subtitles(digest):
 		input_file.write(base64.b64decode(content))
 	nazwa = movie_filename[:-4]+'.srt'
 
-	if (os.system("/usr/local/bin/7z x -y -so -p" + password + " " + input_filename + " 2>/dev/null >\""+nazwa+"\"")):
+	executed = [
+		'/usr/bin/7z', # executable
+		'x', # command: extract
+		'-p' + password, # use password
+		'-y', # assume yes on all queries
+		'-so', # into standard out
+		input_filename, # input file
+	]
+	
+	with open(nazwa, "w") as output_file:
+		process = subprocess.Popen(executed, stdout=output_file)
+		result = process.wait()
+
+	if result != 0:
 		print "nie ma napisa do filmu", sys.argv[1]
 		os.remove(nazwa)				
 	else: