diff --git a/turbolist3r.py b/turbolist3r.py
index 947565d..a4f0df3 100644
--- a/turbolist3r.py
+++ b/turbolist3r.py
@@ -297,12 +297,11 @@ class enumratorBase(object):
 
 
 class enumratorBaseThreaded(multiprocessing.Process, enumratorBase):
-    def __init__(self, base_url, engine_name, domain, subdomains=None, q=None, lock=threading.Lock(), silent=False,
+    def __init__(self, base_url, engine_name, domain, subdomains=None, q=None, silent=False,
                  verbose=True):
         subdomains = subdomains or []
         enumratorBase.__init__(self, base_url, engine_name, domain, subdomains, silent=silent, verbose=verbose)
         multiprocessing.Process.__init__(self)
-        self.lock = lock
         self.q = q
         return
 
@@ -565,7 +564,6 @@ class NetcraftEnum(enumratorBaseThreaded):
         subdomains = subdomains or []
         self.base_url = 'https://searchdns.netcraft.com/?restriction=site+ends+with&host={domain}'
         self.engine_name = "Netcraft"
-        self.lock = threading.Lock()
         super(NetcraftEnum, self).__init__(self.base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                            verbose=verbose)
         self.q = q
@@ -641,6 +639,7 @@ class DNSdumpster(enumratorBaseThreaded):
         self.threads = 70
         self.lock = threading.BoundedSemaphore(value=self.threads)
         self.q = q
+        self.lock = None
         super(DNSdumpster, self).__init__(base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                           verbose=verbose)
         return
@@ -698,6 +697,7 @@ class DNSdumpster(enumratorBaseThreaded):
         return token.strip()
 
     def enumerate(self):
+        self.lock = threading.BoundedSemaphore(value=70)
         resp = self.req('GET', self.base_url)
         token = self.get_csrftoken(resp)
         params = {'csrfmiddlewaretoken': token, 'targetip': self.domain}
@@ -739,7 +739,6 @@ class Virustotal(enumratorBaseThreaded):
         subdomains = subdomains or []
         base_url = 'https://www.virustotal.com/en/domain/{domain}/information/'
         self.engine_name = "Virustotal"
-        self.lock = threading.Lock()
         self.q = q
         super(Virustotal, self).__init__(base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                          verbose=verbose)
@@ -784,7 +783,6 @@ class ThreatCrowd(enumratorBaseThreaded):
         subdomains = subdomains or []
         base_url = 'https://www.threatcrowd.org/searchApi/v2/domain/report/?domain={domain}'
         self.engine_name = "ThreatCrowd"
-        self.lock = threading.Lock()
         self.q = q
         super(ThreatCrowd, self).__init__(base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                           verbose=verbose)
@@ -831,7 +829,6 @@ class CrtSearch(enumratorBaseThreaded):
         subdomains = subdomains or []
         base_url = 'https://crt.sh/?q=%25.{domain}'
         self.engine_name = "SSL Certificates"
-        self.lock = threading.Lock()
         self.q = q
         super(CrtSearch, self).__init__(base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                         verbose=verbose)
@@ -878,7 +875,6 @@ class PassiveDNS(enumratorBaseThreaded):
         subdomains = subdomains or []
         base_url = 'http://ptrarchive.com/tools/search.htm?label={domain}'
         self.engine_name = "PassiveDNS"
-        self.lock = threading.Lock()
         self.q = q
         super(PassiveDNS, self).__init__(base_url, self.engine_name, domain, subdomains, q=q, silent=silent,
                                          verbose=verbose)
@@ -938,9 +934,7 @@ class portscan():
     def __init__(self, subdomains, ports):
         self.subdomains = subdomains
         self.ports = ports
-        self.threads = 20
-        self.lock = threading.BoundedSemaphore(value=self.threads)
-
+        self.lock = None
     def port_scan(self, host, ports):
         openports = []
         self.lock.acquire()
@@ -959,6 +953,7 @@ class portscan():
             print("%s%s%s - %sFound open ports:%s %s%s%s" % (G, host, W, R, W, Y, ', '.join(openports), W))
 
     def run(self):
+        self.lock = threading.BoundedSemaphore(value=20)
         for subdomain in self.subdomains:
             t = threading.Thread(target=self.port_scan, args=(subdomain, self.ports))
             t.start()