diff --git a/extra/cloak/cloak.py b/extra/cloak/cloak.py
index 5283d67c7..508a77bb9 100755
--- a/extra/cloak/cloak.py
+++ b/extra/cloak/cloak.py
@@ -9,6 +9,7 @@ See the file 'doc/COPYING' for copying permission
 
 import os
 import sys
+import zlib
 
 from optparse import OptionError
 from optparse import OptionParser
@@ -24,20 +25,16 @@ def hideAscii(data):
     return retVal
 
 def cloak(inputFile):
-    import bz2
-
     f = open(inputFile, 'rb')
-    data = bz2.compress(f.read())
+    data = zlib.compress(f.read())
     f.close()
 
     return hideAscii(data)
 
 def decloak(inputFile):
-    import bz2
-
     f = open(inputFile, 'rb')
     try:
-        data = bz2.decompress(hideAscii(f.read()))
+        data = zlib.decompress(hideAscii(f.read()))
     except:
         print 'ERROR: the provided input file \'%s\' does not contain valid cloaked content' % inputFile
         sys.exit(1)
diff --git a/extra/icmpsh/icmpsh.exe_ b/extra/icmpsh/icmpsh.exe_
index cd3c62e09..a1eb995cb 100644
Binary files a/extra/icmpsh/icmpsh.exe_ and b/extra/icmpsh/icmpsh.exe_ differ
diff --git a/extra/shellcodeexec/linux/shellcodeexec.x32_ b/extra/shellcodeexec/linux/shellcodeexec.x32_
index cc5917254..ec62f2303 100644
Binary files a/extra/shellcodeexec/linux/shellcodeexec.x32_ and b/extra/shellcodeexec/linux/shellcodeexec.x32_ differ
diff --git a/extra/shellcodeexec/linux/shellcodeexec.x64_ b/extra/shellcodeexec/linux/shellcodeexec.x64_
index 25aa6ea4a..10e8fea3d 100644
Binary files a/extra/shellcodeexec/linux/shellcodeexec.x64_ and b/extra/shellcodeexec/linux/shellcodeexec.x64_ differ
diff --git a/extra/shellcodeexec/windows/shellcodeexec.x32.exe_ b/extra/shellcodeexec/windows/shellcodeexec.x32.exe_
index a26bb6e10..4d699f123 100644
Binary files a/extra/shellcodeexec/windows/shellcodeexec.x32.exe_ and b/extra/shellcodeexec/windows/shellcodeexec.x32.exe_ differ
diff --git a/lib/utils/versioncheck.py b/lib/utils/versioncheck.py
index 3d882171e..f6e57d9af 100644
--- a/lib/utils/versioncheck.py
+++ b/lib/utils/versioncheck.py
@@ -12,7 +12,7 @@ PYVERSION = sys.version.split()[0]
 if PYVERSION >= "3" or PYVERSION < "2.6":
     exit("[CRITICAL] incompatible Python version detected ('%s'). For successfully running sqlmap you'll have to use version 2.6 or 2.7 (visit 'http://www.python.org/download/')" % PYVERSION)
 
-extensions = ("bz2", "gzip", "ssl", "sqlite3", "zlib")
+extensions = ("gzip", "ssl", "sqlite3", "zlib")
 try:
     for _ in extensions:
         __import__(_)
diff --git a/shell/backdoor.asp_ b/shell/backdoor.asp_
index 720f13de6..d126faee7 100644
Binary files a/shell/backdoor.asp_ and b/shell/backdoor.asp_ differ
diff --git a/shell/backdoor.aspx_ b/shell/backdoor.aspx_
index 178c1185a..af7f6d584 100644
Binary files a/shell/backdoor.aspx_ and b/shell/backdoor.aspx_ differ
diff --git a/shell/backdoor.jsp_ b/shell/backdoor.jsp_
index 60f80dabf..ef32603bb 100644
Binary files a/shell/backdoor.jsp_ and b/shell/backdoor.jsp_ differ
diff --git a/shell/backdoor.php_ b/shell/backdoor.php_
index 7953ba9ce..172dd5f22 100644
Binary files a/shell/backdoor.php_ and b/shell/backdoor.php_ differ
diff --git a/shell/runcmd.exe_ b/shell/runcmd.exe_
index 109987ea1..5e0d05a99 100644
Binary files a/shell/runcmd.exe_ and b/shell/runcmd.exe_ differ
diff --git a/shell/stager.asp_ b/shell/stager.asp_
index 377109575..75a64c1fc 100644
Binary files a/shell/stager.asp_ and b/shell/stager.asp_ differ
diff --git a/shell/stager.aspx_ b/shell/stager.aspx_
index d160e68fb..54d565039 100644
Binary files a/shell/stager.aspx_ and b/shell/stager.aspx_ differ
diff --git a/shell/stager.jsp_ b/shell/stager.jsp_
index 730a13751..0aa088601 100644
Binary files a/shell/stager.jsp_ and b/shell/stager.jsp_ differ
diff --git a/shell/stager.php_ b/shell/stager.php_
index 763e892d1..64f8eacab 100644
Binary files a/shell/stager.php_ and b/shell/stager.php_ differ