diff --git a/crackers/unzip.py b/crackers/unzip.py
index a3594cf..de1d89d 100644
--- a/crackers/unzip.py
+++ b/crackers/unzip.py
@@ -1,4 +1,5 @@
 import zipfile
+import optparse
 from threading import Thread
 def extractFile(zFile, password):
     try:
@@ -7,8 +8,18 @@ def extractFile(zFile, password):
     except:
         pass
 def main():
-    zFile = zipfile.ZipFile("secret.zip")
-    passFile = open("dictionary.txt")
+    parser = optparse.OptionParser("usage%prog " + "-f <zipfile> -d <dictionary>")
+    parser.add_option("-f", dest="zname", type="string", help="specify zip file")
+    parser.add_option("-d", dest="dname", tpye="string", help="specify dictionary file")
+    (options, args) = parser.parse_args()
+    if (options.zname == None) | (options.dname == None):
+        print parser.usage
+        exit(0)
+    else:
+        zname = options.zname
+        dname = options.dname
+    zFile = zipfile.ZipFile(zname)
+    passFile = open(dname)
     for line in passFile.readlines():
         password = line.strip('\n')
         t = Thread(target=extractFile, args=(zFile, password))