diff --git a/main.py b/main.py
index 468f8c0..4a9f098 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,6 @@
 import requests
 import subprocess
+import shlex
 
 def func_calls():
     formats.get_format()
@@ -13,14 +14,14 @@ def func_calls():
         'http': 'http://test:pass@localhost:8080',
         'https': 'http://test:pass@localhost:8090',
     }
-    url = 'http://example.com'  # Replace with a valid URL
+    url = 'https://example.com'  # Replace with a valid URL
     req = requests.Request('GET', url)
     prep = req.prepare()
     session.rebuild_proxies(prep, proxies)
 
-    # Introduce a command injection vulnerability
+    # Fix command injection vulnerability
     user_input = input("Enter a command to execute: ")
-    command = "ping " + user_input
-    subprocess.call(command, shell=True)
+    command = ["ping"] + shlex.split(user_input)
+    subprocess.Popen(command, shell=False)
 
-    print("Command executed!")
\ No newline at end of file
+    print("Command executed!")