diff --git a/lib/core/agent.py b/lib/core/agent.py
index 1a76f5375..24c498e6d 100644
--- a/lib/core/agent.py
+++ b/lib/core/agent.py
@@ -196,9 +196,9 @@ class Agent(object):
         if place in (PLACE.URI, PLACE.CUSTOM_POST, PLACE.CUSTOM_HEADER):
             _ = "%s%s" % (origValue, kb.customInjectionMark)
 
-            if kb.postHint == POST_HINT.JSON and not isNumber(newValue) and '"%s"' % _ not in paramString:
+            if kb.postHint == POST_HINT.JSON and isNumber(origValue) and not isNumber(newValue) and '"%s"' % _ not in paramString:
                 newValue = '"%s"' % self.addPayloadDelimiters(newValue)
-            elif kb.postHint == POST_HINT.JSON_LIKE and not isNumber(newValue) and re.search(r"['\"]%s['\"]" % re.escape(_), paramString) is None:
+            elif kb.postHint == POST_HINT.JSON_LIKE and isNumber(origValue) and not isNumber(newValue) and re.search(r"['\"]%s['\"]" % re.escape(_), paramString) is None:
                 newValue = "'%s'" % self.addPayloadDelimiters(newValue)
             else:
                 newValue = self.addPayloadDelimiters(newValue)
diff --git a/lib/core/settings.py b/lib/core/settings.py
index ed06c2c24..d444efd6a 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -20,7 +20,7 @@ from thirdparty import six
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.6.7.1"
+VERSION = "1.6.7.2"
 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)