diff --git a/lib/core/option.py b/lib/core/option.py
index 5ef766eda..11f9aad1b 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -1556,7 +1556,7 @@ def _setKnowledgeBaseAttributes(flushAll=True):
     kb.lastParserStatus = None
 
     kb.locks = AttribDict()
-    for _ in ("cache", "count", "index", "io", "limit", "log", "value"):
+    for _ in ("cache", "count", "index", "io", "limit", "log", "request", "value"):
         kb.locks[_] = threading.Lock()
 
     kb.matchRatio = None
@@ -1595,6 +1595,7 @@ def _setKnowledgeBaseAttributes(flushAll=True):
     kb.redirectSetCookie = None
     kb.reflectiveMechanism = True
     kb.reflectiveCounters = {REFLECTIVE_COUNTER.MISS: 0, REFLECTIVE_COUNTER.HIT: 0}
+    kb.requestCounter = 0
     kb.responseTimes = []
     kb.resumeValues = True
     kb.safeCharEncode = False
@@ -2007,7 +2008,7 @@ def _basicOptionValidation():
         raise SqlmapSyntaxException(errMsg)
 
     if conf.threads > MAX_NUMBER_OF_THREADS:
-        errMsg = "maximum number of used threads is %d avoiding possible connection issues" % MAX_NUMBER_OF_THREADS
+        errMsg = "maximum number of used threads is %d avoiding potential connection issues" % MAX_NUMBER_OF_THREADS
         raise SqlmapSyntaxException(errMsg)
 
     if conf.forms and not any((conf.url, conf.bulkFile)):
diff --git a/lib/core/threads.py b/lib/core/threads.py
index d9994b91f..18cfcb2f9 100644
--- a/lib/core/threads.py
+++ b/lib/core/threads.py
@@ -110,7 +110,7 @@ def runThreads(numThreads, threadFunction, cleanupFunction=None, forwardExceptio
             choice = readInput(message, default=str(numThreads))
             if choice and choice.isdigit():
                 if int(choice) > MAX_NUMBER_OF_THREADS:
-                    errMsg = "maximum number of used threads is %d avoiding possible connection issues" % MAX_NUMBER_OF_THREADS
+                    errMsg = "maximum number of used threads is %d avoiding potential connection issues" % MAX_NUMBER_OF_THREADS
                     logger.critical(errMsg)
                 else:
                     numThreads = int(choice)
diff --git a/lib/request/connect.py b/lib/request/connect.py
index 080a7773f..a0919c63c 100644
--- a/lib/request/connect.py
+++ b/lib/request/connect.py
@@ -179,7 +179,9 @@ class Connect(object):
             cpuThrottle(conf.cpuThrottle)
 
         threadData = getCurrentThreadData()
-        threadData.lastRequestUID += 1
+        with kb.locks.request:
+            kb.requestCounter += 1
+            threadData.lastRequestUID = kb.requestCounter
 
         url = kwargs.get('url',                     conf.url)
         get = kwargs.get('get',                     None)