diff --git a/scripts/http-jsonp-detection.nse b/scripts/http-jsonp-detection.nse
index d75f535e2..5acc12d3f 100644
--- a/scripts/http-jsonp-detection.nse
+++ b/scripts/http-jsonp-detection.nse
@@ -65,7 +65,7 @@ end
 --Checks if the callback function is controllable from URL
 local callback_url = function(host, port, target, callback_variable)
   local path, response, report
-  local value = rand.rand_alpha(8)
+  local value = rand.random_alpha(8)
   if callback_variable == nil then
     callback_variable = "callback"
   end
diff --git a/scripts/http-vuln-cve2011-3368.nse b/scripts/http-vuln-cve2011-3368.nse
index eb2f239e4..0c613fc72 100644
--- a/scripts/http-vuln-cve2011-3368.nse
+++ b/scripts/http-vuln-cve2011-3368.nse
@@ -71,7 +71,7 @@ servers to remote users who send carefully crafted requests.]],
 
   -- Take a reference chrono for a 404
   local start = os.time(os.date('*t'))
-  local random_page = rand.rand_alpha(20)
+  local random_page = rand.random_alpha(20)
   local reference = http.get(host,port,("%s/%s.htm"):format(prefix,random_page))
   local chrono_404 = os.time(os.date('*t'))-start
 
diff --git a/scripts/http-vuln-cve2017-5638.nse b/scripts/http-vuln-cve2017-5638.nse
index c986387a0..60c3d3b10 100644
--- a/scripts/http-vuln-cve2017-5638.nse
+++ b/scripts/http-vuln-cve2017-5638.nse
@@ -62,7 +62,7 @@ vulnerability via the Content-Type header.
 
   local method = stdnse.get_script_args(SCRIPT_NAME..".method") or "GET"
   local path = stdnse.get_script_args(SCRIPT_NAME..".path") or "/"
-  local value = rand.rand_alpha(8)
+  local value = rand.random_alpha(8)
 
   local header = {
     ["Content-Type"] = string.format("%%{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse'].addHeader('X-Check-Struts', '%s')}.multipart/form-data", value)
diff --git a/scripts/rtsp-url-brute.nse b/scripts/rtsp-url-brute.nse
index f2e7773be..7a96c9aa2 100644
--- a/scripts/rtsp-url-brute.nse
+++ b/scripts/rtsp-url-brute.nse
@@ -141,7 +141,7 @@ action = function(host, port)
   -- Try to see what a nonexistent URL looks like
   local status, response = fetch_url(
     host, port, ("rtsp://%s/%s"):format(
-      stdnse.get_hostname(host), rand.rand_alpha(14))
+      stdnse.get_hostname(host), rand.random_alpha(14))
     )
   local status_404 = 404
   if status then