diff --git a/lib/core/settings.py b/lib/core/settings.py
index f801642f5..ff0b863eb 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty import six
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.5.56"
+VERSION = "1.3.5.57"
 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/tamper/randomcase.py b/tamper/randomcase.py
index 923e2a6b2..b25078493 100644
--- a/tamper/randomcase.py
+++ b/tamper/randomcase.py
@@ -37,12 +37,16 @@ def tamper(payload, **kwargs):
     >>> random.seed(0)
     >>> tamper('INSERT')
     'InSeRt'
+    >>> tamper('f()')
+    'f()'
+    >>> tamper('function()')
+    'FuNcTiOn()'
     """
 
     retVal = payload
 
     if payload:
-        for match in re.finditer(r"\b[A-Za-z_]+\b", retVal):
+        for match in re.finditer(r"\b[A-Za-z_]{2,}\b", retVal):
             word = match.group()
 
             if word.upper() in kb.keywords or ("%s(" % word) in payload: