diff --git a/lib/core/common.py b/lib/core/common.py
index 6f981a074..2c0715f23 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -2058,6 +2058,7 @@ def readXmlFile(xmlFile):
 
     return retVal
 
+@cachedmethod
 def stdev(values):
     """
     Computes standard deviation of a list of numbers.
@@ -2069,19 +2070,10 @@ def stdev(values):
 
     if not values or len(values) < 2:
         return None
-
-    key = (values[0], values[-1], len(values))
-
-    if kb.get("cache") and key in kb.cache.stdev:
-        retVal = kb.cache.stdev[key]
     else:
         avg = average(values)
         _ = reduce(lambda x, y: x + pow((y or 0) - avg, 2), values, 0.0)
-        retVal = sqrt(_ / (len(values) - 1))
-        if kb.get("cache"):
-            kb.cache.stdev[key] = retVal
-
-    return retVal
+        return sqrt(_ / (len(values) - 1))
 
 def average(values):
     """
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 2b527e4be..af6d7c1ce 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.1.11.18"
+VERSION = "1.1.11.19"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index c469a3662..ba6f52ab7 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -27,7 +27,7 @@ d2cdb9e832e18a81e936ca3348144b16  lib/controller/handler.py
 5fb9aaf874daa47ea2b672a22740e56b  lib/controller/__init__.py
 fd69e56ce20a5a49ce10a7a745022378  lib/core/agent.py
 d55b4b58019d6dbfddd40ec919f9f172  lib/core/bigarray.py
-f424e35d21529dafe60c0c5564855d5f  lib/core/common.py
+16b63aed575a43c1d406df30a9b22afe  lib/core/common.py
 54326d3a690f8b26fe5a5da1a589b369  lib/core/convert.py
 90b1b08368ac8a859300e6fa6a8c796e  lib/core/data.py
 1c14bdbf47b8dba31f73da9ad731a54a  lib/core/datatype.py
@@ -46,7 +46,7 @@ e1c000db9be27f973569b1a430629037  lib/core/option.py
 760d9df2a27ded29109b390ab202e72d  lib/core/replication.py
 a2466b62e67f8b31736bac4dac590e51  lib/core/revision.py
 02d4762140a72fd44668d3dab5eabda9  lib/core/session.py
-85e16c1193fc5e567addc1cdb77a32d3  lib/core/settings.py
+5f6af60945e1b932d173d9dffe082695  lib/core/settings.py
 35bffbad762eb9e03db9e93b1c991103  lib/core/shell.py
 a59ec28371ae067a6fdd8f810edbee3d  lib/core/subprocessng.py
 d5a04d672a18f78deb2839c3745ff83c  lib/core/target.py