diff --git a/README.md b/README.md
index e9437fc..9015746 100644
--- a/README.md
+++ b/README.md
@@ -44,14 +44,19 @@ also @alphatr write a tool transform .aria2 file to a magnet link use javascript
 # ================================================================
 ```
 
-# how to run
-
-```
-python aria2_to_magnet.py -f dahufa.aria2
+## how to run
 
+```bash
+python aria2_to_magnet.py dahufa.aria2
 ```
 
 output
 ```
 magnet:?xt=urn:btih:959E2ECEB954313D3869EFF7924CA7CD8DE739
-```
\ No newline at end of file
+```
+
+with multiple files
+```bash
+python aria2_to_magnet.py *.aria2
+```
+
diff --git a/aria2_to_magnet.py b/aria2_to_magnet.py
index da7b085..c250c24 100755
--- a/aria2_to_magnet.py
+++ b/aria2_to_magnet.py
@@ -4,7 +4,7 @@ import binascii
 import argparse
 
 parser = argparse.ArgumentParser()
-parser.add_argument("-f", "--file", required=True,
+parser.add_argument("file", nargs='+',
                     help="input file XXX.aria2")
 
 args = parser.parse_args()
@@ -76,8 +76,9 @@ def parse_aria_control_file(file_name):
 
 
 if __name__ == '__main__':
-    file_name = args.file
-    parse_aria_control_file(file_name)
+    file_list = args.file
+    for file_name in file_list:
+        parse_aria_control_file(file_name)
     # version is 1
     # hash length is 20
     # magnet:?xt=urn:btih:959E2ECEB954313D38690EFF7924CA7CD80DE739