diff --git a/lib/core/common.py b/lib/core/common.py
index ae95a90cc..41517b4a4 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -2708,7 +2708,14 @@ def popValue():
     'foobar'
     """
 
-    return getCurrentThreadData().valueStack.pop()
+    retVal = None
+
+    try:
+        retVal = getCurrentThreadData().valueStack.pop()
+    except IndexError:
+        pass
+
+    return retVal
 
 def wasLastResponseDBMSError():
     """
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 36d7f9cc8..c18fb8981 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.5.5.11"
+VERSION = "1.5.5.12"
 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)