diff --git a/netlib/http.py b/netlib/http.py
index 7060b688b..e160bd790 100644
--- a/netlib/http.py
+++ b/netlib/http.py
@@ -233,6 +233,10 @@ def parse_init(line):
 
 
 def parse_init_connect(line):
+    """
+        Returns (host, port, httpversion) if line is a valid CONNECT line.
+        http://tools.ietf.org/html/draft-luotonen-web-proxy-tunneling-01 section 3.1
+    """
     v = parse_init(line)
     if not v:
         return None
diff --git a/netlib/http_auth.py b/netlib/http_auth.py
index 69bee5c18..8f062826b 100644
--- a/netlib/http_auth.py
+++ b/netlib/http_auth.py
@@ -126,8 +126,6 @@ class AuthAction(Action):
     """
     def __call__(self, parser, namespace, values, option_string=None):
         passman = self.getPasswordManager(values)
-        if not passman:
-            raise ArgumentTypeError("Error creating password manager for proxy authentication.")
         authenticator = BasicProxyAuth(passman, "mitmproxy")
         setattr(namespace, self.dest, authenticator)
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..ede8bf4a3
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+pyasn1>=0.1.7
+pyOpenSSL>=0.13
+nose>=1.3.0
+pathod>=0.9.2
\ No newline at end of file