diff --git a/lib/core/option.py b/lib/core/option.py
index 3d6fdf820..0776c7a11 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -2591,6 +2591,13 @@ def _basicOptionValidation():
         errMsg = "switch '--no-cast' is incompatible with switch '--hex'"
         raise SqlmapSyntaxException(errMsg)
 
+    if conf.crawlDepth:
+        try:
+            xrange(conf.crawlDepth)
+        except OverflowError as ex:
+            errMsg = "invalid value used for option '--crawl' ('%s')" % getSafeExString(ex)
+            raise SqlmapSyntaxException(errMsg)
+
     if conf.dumpAll and conf.search:
         errMsg = "switch '--dump-all' is incompatible with switch '--search'"
         raise SqlmapSyntaxException(errMsg)
diff --git a/lib/core/settings.py b/lib/core/settings.py
index bedf98b83..add55a23b 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.4.12.33"
+VERSION = "1.4.12.34"
 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)