diff --git a/nselib/creds.lua b/nselib/creds.lua
index 7d8d4b5e1..c56f08ccf 100644
--- a/nselib/creds.lua
+++ b/nselib/creds.lua
@@ -114,7 +114,6 @@
 --                  scripts
 --
 
-local bit = require "bit"
 local coroutine = require "coroutine"
 local io = require "io"
 local ipOps = require "ipOps"
@@ -248,7 +247,7 @@ RegStorage = {
             coroutine.yield(v)
           end
         elseif ( ( host and ( h == host or h == host.ip ) ) and port.number == v.port ) then
-          if ( not(self.filter.state) or ( v.state == bit.band(self.filter.state, v.state) ) ) then
+          if ( not(self.filter.state) or ( v.state == (self.filter.state & v.state) ) ) then
             coroutine.yield(v)
           end
         end
@@ -395,7 +394,7 @@ Credentials = {
         end
       end
 
-      if ( state and State.PARAM == bit.band(state, State.PARAM) ) then
+      if ( state and State.PARAM == (state & State.PARAM) ) then
         local creds_global = stdnse.get_script_args('creds.global')
         local creds_service
         local creds_params
diff --git a/nselib/dhcp6.lua b/nselib/dhcp6.lua
index a3343572a..71b77671c 100644
--- a/nselib/dhcp6.lua
+++ b/nselib/dhcp6.lua
@@ -22,7 +22,6 @@
 --
 
 local bin = require "bin"
-local bit = require "bit"
 local datetime = require "datetime"
 local ipOps = require "ipOps"
 local math = require "math"
@@ -453,7 +452,7 @@ DHCP6.Request = {
   -- Converts option to a string
   -- @return str string containing the class instance as string
   __tostring = function(self)
-    local tmp = bit.lshift(self.type, 24) + self.xid
+    local tmp = (self.type << 24) + self.xid
     local data = ""
 
     for _, opt in ipairs(self.opts) do
@@ -488,9 +487,9 @@ DHCP6.Response = {
     local resp = DHCP6.Response:new()
     local pos, tmp = bin.unpack(">I", data)
 
-    resp.msgtype = bit.band(tmp, 0xFF000000)
-    resp.msgtype = bit.rshift(resp.msgtype, 24)
-    resp.xid = bit.band(tmp, 0x00FFFFFF)
+    resp.msgtype = (tmp & 0xFF000000)
+    resp.msgtype = (resp.msgtype >> 24)
+    resp.xid = (tmp & 0x00FFFFFF)
     while( pos < #data ) do
       local opt = {}
       pos, opt.type, opt.data = bin.unpack(">SP", data, pos)
diff --git a/nselib/dns.lua b/nselib/dns.lua
index 5caac382a..bb9e2024e 100644
--- a/nselib/dns.lua
+++ b/nselib/dns.lua
@@ -31,7 +31,6 @@
 
 
 local bin = require "bin"
-local bit = require "bit"
 local coroutine = require "coroutine"
 local ipOps = require "ipOps"
 local nmap = require "nmap"
@@ -1053,11 +1052,11 @@ local function bit_iter(bits)
       local mask = 0x80
 
       while mask > 0 do
-        if bit.band(n, mask) ~= 0 then
+        if (n & mask) ~= 0 then
           coroutine.yield((i - 1) * 8 + j)
         end
         j = j + 1
-        mask = bit.rshift(mask, 1)
+        mask = (mask >> 1)
       end
     end
   end)
diff --git a/nselib/dnsbl.lua b/nselib/dnsbl.lua
index 885ed6506..3d6ecba78 100644
--- a/nselib/dnsbl.lua
+++ b/nselib/dnsbl.lua
@@ -18,7 +18,6 @@
 -- @author Patrik Karlsson <patrik@cqure.net>
 --
 
-local bit = require "bit"
 local coroutine = require "coroutine"
 local dns = require "dns"
 local ipOps = require "ipOps"
@@ -214,7 +213,7 @@ SERVICES = {
           local result = {}
 
           for k, v in pairs(responses) do
-            if ( bit.band( code, k ) == k ) then
+            if ( ( code & k ) == k ) then
               table.insert(result, v)
             end
           end
@@ -397,17 +396,17 @@ SERVICES = {
             local activity = {}
             activity['name'] = "Activity"
             -- Suspicious activity
-            if ( bit.band(octet4, 1) == 1) then
+            if ( (octet4 & 1) == 1) then
               table.insert(activity, "Suspicious")
             end
 
             -- Harvester
-            if ( bit.band(octet4, 2) == 2) then
+            if ( (octet4 & 2) == 2) then
               table.insert(activity, "Harvester")
             end
 
             -- Comment spammer
-            if ( bit.band(octet4, 4)  == 4) then
+            if ( (octet4 & 4)  == 4) then
               table.insert(activity, "Comment spammer")
             end
 
diff --git a/nselib/drda.lua b/nselib/drda.lua
index 36cef563f..caf3321be 100644
--- a/nselib/drda.lua
+++ b/nselib/drda.lua
@@ -59,7 +59,6 @@
 --                             x IBM Informix Dynamic Server
 
 local bin = require "bin"
-local bit = require "bit"
 local match = require "match"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
@@ -404,7 +403,7 @@ DDM = {
   --
   -- @return true if the DRDA is to be chained, false if it's the last one
   isChained = function( self )
-    if ( bit.band( self.Format, DDM.Formats.CHAINED ) == DDM.Formats.CHAINED ) then
+    if ( (self.Format & DDM.Formats.CHAINED) == DDM.Formats.CHAINED ) then
       return true
     end
     return false
@@ -415,9 +414,9 @@ DDM = {
   -- @param chained boolean true if more DRDA's are following
   setChained = function( self, chained )
     if ( self:isChained() ) then
-      self.Format = bit.bxor( self.Format, self.Formats.CHAINED )
+      self.Format = ( self.Format ~ self.Formats.CHAINED )
     else
-      self.Format = bit.bor( self.Format, self.Formats.CHAINED )
+      self.Format = ( self.Format | self.Formats.CHAINED )
     end
   end,
 
diff --git a/nselib/http.lua b/nselib/http.lua
index 637adae5b..af6130b39 100644
--- a/nselib/http.lua
+++ b/nselib/http.lua
@@ -113,7 +113,6 @@
 
 local base64 = require "base64"
 local bin = require "bin"
-local bit = require "bit"
 local comm = require "comm"
 local coroutine = require "coroutine"
 local nmap = require "nmap"
@@ -1375,8 +1374,8 @@ function generic_request(host, port, method, path, options)
       return
     end
 
-    local is_unicode  = (bit.band(flags_received, 0x00000001) == 0x00000001) -- 0x00000001 UNICODE Flag
-    local is_extended = (bit.band(flags_received, 0x00080000) == 0x00080000) -- 0x00080000 Extended Security Flag
+    local is_unicode  = ((flags_received & 0x00000001) == 0x00000001) -- 0x00000001 UNICODE Flag
+    local is_extended = ((flags_received & 0x00080000) == 0x00080000) -- 0x00080000 Extended Security Flag
     local type_3_flags = 0xa2888206 -- flags 56, 128, Version, Target Info, Extended Security, Always Sign, NTLM Key, OEM
 
     local lanman, ntlm
diff --git a/nselib/iax2.lua b/nselib/iax2.lua
index 185032890..9ab96c3c1 100644
--- a/nselib/iax2.lua
+++ b/nselib/iax2.lua
@@ -6,7 +6,6 @@
 --
 
 local bin = require "bin"
-local bit = require "bit"
 local math = require "math"
 local nmap = require "nmap"
 local os = require "os"
@@ -74,22 +73,22 @@ IAX2 = {
     parse = function(data)
       local header = IAX2.Header:new()
       local pos, frame_type = bin.unpack("C", data)
-      if ( bit.band(frame_type, 0x80) == 0 ) then
+      if ( (frame_type & 0x80) == 0 ) then
         print("frame_type", stdnse.tohex(frame_type))
         stdnse.debug2("Frametype not supported")
         return
       end
       header.type = IAX2.PacketType.FULL
       pos, header.src_call = bin.unpack(">S", data)
-      header.src_call = bit.band(header.src_call, 0x7FFF)
+      header.src_call = (header.src_call & 0x7FFF)
 
       local retrans
       pos, retrans = bin.unpack("C", data, pos)
-      if ( bit.band(retrans, 0x80) == 8 ) then
+      if ( (retrans & 0x80) == 8 ) then
         header.retrans = true
       end
       pos, header.dst_call = bin.unpack(">S", data, pos - 1)
-      header.dst_call = bit.band(header.dst_call, 0x7FFF)
+      header.dst_call = (header.dst_call & 0x7FFF)
 
       pos, header.timestamp, header.oseqno,
         header.iseqno, header.frametype, header.subclass = bin.unpack(">ICCCC", data, pos)
diff --git a/nselib/msrpcperformance.lua b/nselib/msrpcperformance.lua
index 4f0987e36..0ee8116f1 100644
--- a/nselib/msrpcperformance.lua
+++ b/nselib/msrpcperformance.lua
@@ -18,7 +18,6 @@
 -----------------------------------------------------------------------
 
 local bin = require "bin"
-local bit = require "bit"
 local msrpc = require "msrpc"
 local msrpctypes = require "msrpctypes"
 local stdnse = require "stdnse"
@@ -536,7 +535,7 @@ function get_performance_data(host, objects)
       pos = object_start + object_type['DefinitionLength']
 
       -- Check if we have any instances (sometimes we don't -- if we don't, the value returned is a negative)
-      if(bit.band(object_type['NumInstances'], 0x80000000) == 0) then
+      if (object_type['NumInstances'] & 0x80000000) == 0 then
         -- Parse the object instances and counters
         for j = 1, object_type['NumInstances'], 1 do
           local instance_start = pos
diff --git a/nselib/msrpctypes.lua b/nselib/msrpctypes.lua
index 441a2dad7..34c6be13a 100644
--- a/nselib/msrpctypes.lua
+++ b/nselib/msrpctypes.lua
@@ -104,7 +104,6 @@
 -- * GUIDs are stored as tables of values; however, I might change this to a string representation at some point
 
 local bin = require "bin"
-local bit = require "bit"
 local os = require "os"
 local stdnse = require "stdnse"
 local string = require "string"
@@ -1294,7 +1293,7 @@ local function marshall_Enum32(val, table)
   local i
 
   for i = 1, #vals, 1 do
-    result = bit.bor(result, table[vals[i]])
+    result = result | table[vals[i]]
   end
 
   result = marshall_int32(result)
@@ -1380,7 +1379,7 @@ local function marshall_Enum8(val, table, pad)
   local i
 
   for i = 1, #vals, 1 do
-    result = bit.bor(result, table[vals[i]])
+    result = result | table[vals[i]]
   end
 
   result = marshall_int8(result, pad)
@@ -1407,7 +1406,7 @@ local function unmarshall_Enum32_array(data, pos, table)
   pos, val = unmarshall_int32(data, pos)
 
   for i, v in pairs(table) do
-    if(bit.band(v, val) ~= 0) then
+    if (v & val) ~= 0 then
       array[#array + 1] = i
     end
   end
@@ -1552,7 +1551,7 @@ function unmarshall_dom_sid2(data, pos)
   if(sid['authority_low'] == nil) then
     stdnse.debug1("MSRPC: ERROR: Ran off the end of a packet in unmarshall_dom_sid2(). Please report!")
   end
-  sid['authority'] = bit.bor(bit.lshift(sid['authority_high'], 32), sid['authority_low'])
+  sid['authority'] = (sid['authority_high'] << 32) | sid['authority_low']
 
   sid['sub_auths']   = {}
   for i = 1, sid['num_auths'], 1 do
@@ -1614,8 +1613,8 @@ function marshall_dom_sid2(sid)
 
   pos = pos_next + 1
   pos_next = string.find(sid, "-", pos)
-  sid_array['authority_high'] = bit.rshift(string.sub(sid, pos, pos_next - 1), 32)
-  sid_array['authority_low']  = bit.band(string.sub(sid, pos, pos_next - 1), 0xFFFFFFFF)
+  sid_array['authority_high'] = string.sub(sid, pos, pos_next - 1) >> 32
+  sid_array['authority_low']  = string.sub(sid, pos, pos_next - 1) & 0xFFFFFFFF
 
   sid_array['sub_auths'] = {}
   i = 1
diff --git a/nselib/mssql.lua b/nselib/mssql.lua
index dc1c809b7..a0748faed 100644
--- a/nselib/mssql.lua
+++ b/nselib/mssql.lua
@@ -104,7 +104,6 @@
 --       will not be stored for use by other ms-sql-* scripts.
 
 local bin = require "bin"
-local bit = require "bit"
 local math = require "math"
 local match = require "match"
 local nmap = require "nmap"
@@ -2280,7 +2279,7 @@ TDSStream = {
 
       -- Check the status flags in the TDS packet to see if the message is
       -- continued in another TDS packet.
-      tdsPacketAvailable = (bit.band( messageStatus, TDSStream.MESSAGE_STATUS_FLAGS.EndOfMessage) ~=
+      tdsPacketAvailable = (( messageStatus & TDSStream.MESSAGE_STATUS_FLAGS.EndOfMessage) ~=
         TDSStream.MESSAGE_STATUS_FLAGS.EndOfMessage)
     end
 
@@ -3111,10 +3110,10 @@ Auth = {
     local xormask = 0x5a5a
 
     return password:gsub(".", function(i)
-      local c = bit.bxor( string.byte( i ), xormask )
-      local m1= bit.band( bit.rshift( c, 4 ), 0x0F0F )
-      local m2= bit.band( bit.lshift( c, 4 ), 0xF0F0 )
-      return bin.pack("<S", bit.bor( m1, m2 ) )
+      local c = string.byte( i ) ~ xormask
+      local m1= ( c >> 4 ) & 0x0F0F
+      local m2= ( c << 4 ) & 0xF0F0
+      return bin.pack("<S", m1 | m2 )
     end)
   end,
 
diff --git a/nselib/mysql.lua b/nselib/mysql.lua
index a7cb48a66..1603994e8 100644
--- a/nselib/mysql.lua
+++ b/nselib/mysql.lua
@@ -8,7 +8,6 @@
 -- @author Patrik Karlsson <patrik@cqure.net>
 
 local bin = require "bin"
-local bit = require "bit"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
 local string = require "string"
@@ -93,8 +92,8 @@ local function decodeHeader( data, pos )
   local pos, tmp = pos or 1, 0
 
   pos, tmp = bin.unpack( "I", data, pos )
-  response.len = bit.band( tmp,255 )
-  response.number = bit.rshift( tmp, 24 )
+  response.len = ( tmp & 255 )
+  response.number = ( tmp >> 24 )
 
   return pos, response
 end
@@ -193,7 +192,7 @@ local function createLoginHash(pass, salt)
     _, b1 = bin.unpack( "C", hash_stage1, pos )
     _, b2 = bin.unpack( "C", hash_stage3, pos )
 
-    reply[pos] = string.char( bit.bxor( b2, b1 ) )
+    reply[pos] = string.char( b2 ~ b1 )
   end
 
   return table.concat(reply)
@@ -255,7 +254,7 @@ function loginRequest( socket, params, username, password, salt )
     hash
     )
 
-  local tmp = packet:len() + bit.lshift( packetno, 24 )
+  local tmp = packet:len() + ( packetno << 24 )
 
   packet = bin.pack( "I", tmp ) .. packet
 
diff --git a/nselib/ncp.lua b/nselib/ncp.lua
index 0061e3d9a..88a84f1d3 100644
--- a/nselib/ncp.lua
+++ b/nselib/ncp.lua
@@ -51,7 +51,6 @@
 -- Created 24/04/2011 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
 
 local bin = require "bin"
-local bit = require "bit"
 local ipOps = require "ipOps"
 local match = require "match"
 local nmap = require "nmap"
@@ -473,7 +472,7 @@ ResponseParser = {
           "RelDN", "DN" }
         local bits = 1
         for _, field in ipairs(fields) do
-          self[field] = ( bit.band(self.val, bits) == bits )
+          self[field] = ((self.val & bits) == bits)
           bits = bits * 2
         end
       end
diff --git a/nselib/ndmp.lua b/nselib/ndmp.lua
index 5d7c84343..b1a17bac8 100644
--- a/nselib/ndmp.lua
+++ b/nselib/ndmp.lua
@@ -5,7 +5,6 @@
 --
 
 local bin = require "bin"
-local bit = require "bit"
 local match = require "match"
 local nmap = require "nmap"
 local os = require "os"
@@ -52,8 +51,8 @@ NDMP = {
     parse = function(data)
       local fh = NDMP.FragmentHeader:new()
       local _, tmp = bin.unpack(">I", data)
-      fh.length = bit.band(tmp, 0x7fffffff)
-      fh.last= bit.rshift(tmp, 31)
+      fh.length = (tmp & 0x7fffffff)
+      fh.last= (tmp >> 31)
       return fh
     end,
 
diff --git a/nselib/pppoe.lua b/nselib/pppoe.lua
index a124c8277..da40c35d0 100644
--- a/nselib/pppoe.lua
+++ b/nselib/pppoe.lua
@@ -22,7 +22,6 @@
 --
 
 local bin = require "bin"
-local bit = require "bit"
 local math = require "math"
 local nmap = require "nmap"
 local packet = require "packet"
@@ -396,15 +395,15 @@ PPPoE = {
       local pos, vertyp
       local header = PPPoE.Header:new()
       pos, vertyp, header.code, header.session, header.length = bin.unpack(">CCSS", data)
-      header.version = bit.rshift(vertyp,4)
-      header.type = bit.band(vertyp, 0x0F)
+      header.version = (vertyp >> 4)
+      header.type = (vertyp & 0x0F)
       return header
     end,
 
     -- Converts the instance to string
     -- @return string containing the raw config option
     __tostring = function(self)
-      local vertype = bit.lshift(self.version, 4) + self.type
+      local vertype = (self.version << 4) + self.type
       return bin.pack(">CCSS", vertype, self.code, self.session, self.length)
     end,
 
diff --git a/nselib/rmi.lua b/nselib/rmi.lua
index 35bb38367..df8bdd140 100644
--- a/nselib/rmi.lua
+++ b/nselib/rmi.lua
@@ -43,7 +43,6 @@
 -- Fixed more documentation - v0.2 Martin Holst Swende <martin@swende.se>
 
 local bin = require "bin"
-local bit = require "bit"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
 local string = require "string"
@@ -419,7 +418,7 @@ JavaClass = {
   isExternalizable = function(self)
     if self._binaryFlags == nil then return false end
 
-    return bit.band(self._binaryflags, RMIUtils.SC_EXTERNALIZABLE)
+    return (self._binaryflags & RMIUtils.SC_EXTERNALIZABLE)
   end,
 
   addField = function( self, field )
@@ -1510,19 +1509,19 @@ RMIUtils = {
 
   flagsToString = function(flags)
     local retval = ''
-    if ( bit.band(flags, RMIUtils.SC_WRITE_METHOD) ~= 0) then
+    if ( (flags & RMIUtils.SC_WRITE_METHOD) ~= 0) then
       retval = retval .. " WRITE_METHOD"
     end
-    if ( bit.band(flags, RMIUtils.SC_BLOCK_DATA) ~= 0) then
+    if ( (flags & RMIUtils.SC_BLOCK_DATA) ~= 0) then
       retval = retval .. " BLOCK_DATA"
     end
-    if ( bit.band(flags, RMIUtils.SC_EXTERNALIZABLE) ~= 0) then
+    if ( (flags & RMIUtils.SC_EXTERNALIZABLE) ~= 0) then
       retval = retval .. " EXTERNALIZABLE"
     end
-    if ( bit.band(flags, RMIUtils.SC_SERIALIZABLE) ~= 0) then
+    if ( (flags & RMIUtils.SC_SERIALIZABLE) ~= 0) then
       retval = retval .. " SC_SERIALIZABLE"
     end
-    if ( bit.band(flags, RMIUtils.SC_ENUM) ~= 0) then
+    if ( (flags & RMIUtils.SC_ENUM) ~= 0) then
       retval = retval .. " SC_ENUM"
     end
     return retval
diff --git a/nselib/sasl.lua b/nselib/sasl.lua
index a73ac3ad0..c5cc74fdc 100644
--- a/nselib/sasl.lua
+++ b/nselib/sasl.lua
@@ -42,7 +42,6 @@
 
 
 local bin = require "bin"
-local bit = require "bit"
 local smbauth = require "smbauth"
 local stdnse = require "stdnse"
 local string = require "string"
@@ -206,8 +205,8 @@ if HAVE_SSL then
         error("NTLM parseChallenge expected message type: 0x02")
       end
 
-      self.is_extended = ( bit.band(self.flags, NTLM_NegotiateExtendedSecurity) == NTLM_NegotiateExtendedSecurity )
-      local is_unicode  = ( bit.band(self.flags, NTLM_NegotiateUnicode) == NTLM_NegotiateUnicode )
+      self.is_extended = ( (self.flags & NTLM_NegotiateExtendedSecurity) == NTLM_NegotiateExtendedSecurity )
+      local is_unicode  = ( (self.flags & NTLM_NegotiateUnicode) == NTLM_NegotiateUnicode )
 
       self.workstation = "NMAP-HOST"
       self.domain = self.username:match("^(.-)\\(.*)$") or "DOMAIN"