diff --git a/lib/core/common.py b/lib/core/common.py
index a4898e255..2908bc260 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -3280,14 +3280,17 @@ def checkIntegrity():
     logger.debug("running code integrity check")
 
     retVal = True
-    for checksum, _ in (re.split(r'\s+', _) for _ in getFileItems(paths.CHECKSUM_MD5)):
-        path = os.path.normpath(os.path.join(paths.SQLMAP_ROOT_PATH, _))
-        if not os.path.isfile(path):
-            logger.error("missing file detected '%s'" % path)
-            retVal = False
-        elif md5File(path) != checksum:
-            logger.error("wrong checksum of file '%s' detected" % path)
-            retVal = False
+
+    if os.path.isfile(paths.CHECKSUM_MD5):
+        for checksum, _ in (re.split(r'\s+', _) for _ in getFileItems(paths.CHECKSUM_MD5)):
+            path = os.path.normpath(os.path.join(paths.SQLMAP_ROOT_PATH, _))
+            if not os.path.isfile(path):
+                logger.error("missing file detected '%s'" % path)
+                retVal = False
+            elif md5File(path) != checksum:
+                logger.error("wrong checksum of file '%s' detected" % path)
+                retVal = False
+
     return retVal
 
 def unhandledExceptionMessage():
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 5d345a650..70b9fba45 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 = "1.2.4.8"
+VERSION = "1.2.4.9"
 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 b0b6740f4..3af4187b6 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -27,7 +27,7 @@ c7443613a0a2505b1faec931cee2a6ef  lib/controller/handler.py
 1e5532ede194ac9c083891c2f02bca93  lib/controller/__init__.py
 b1990c7805943f0c973a853bba981d96  lib/core/agent.py
 fd8f239e259afaf5f24bcf34a0ad187f  lib/core/bigarray.py
-58312f5c2f252145ec4aed01bc7952a0  lib/core/common.py
+31cd0692a626da935b1cac8f2cfba25a  lib/core/common.py
 0d082da16c388b3445e656e0760fb582  lib/core/convert.py
 9f87391b6a3395f7f50830b391264f27  lib/core/data.py
 72016ea5c994a711a262fd64572a0fcd  lib/core/datatype.py
@@ -46,7 +46,7 @@ c9a56e58984420a5abb7a3f7aadc196d  lib/core/optiondict.py
 0c3eef46bdbf87e29a3f95f90240d192  lib/core/replication.py
 a7db43859b61569b601b97f187dd31c5  lib/core/revision.py
 fcb74fcc9577523524659ec49e2e964b  lib/core/session.py
-f7a3dd2314df4d3bc09ae192558ff874  lib/core/settings.py
+3ae3e12c5183d4468fbeb1cb6f4e231c  lib/core/settings.py
 0dfc2ed40adf72e302291f6ecd4406f6  lib/core/shell.py
 a7edc9250d13af36ac0108f259859c19  lib/core/subprocessng.py
 a35efa7bec9f1e6cedf17c9830a79241  lib/core/target.py