diff --git a/maigret/resources/data.json b/maigret/resources/data.json
index 46d0f05..45df95f 100644
--- a/maigret/resources/data.json
+++ b/maigret/resources/data.json
@@ -3767,7 +3767,7 @@
             "absenceStrs": [
                 "Couldn't find any profile with name"
             ],
-            "regexCheck": "^.{1,25}$",
+            "regexCheck": "^[A-Za-z0-9_]{3,16}$",
             "usernameClaimed": "blue",
             "usernameUnclaimed": "noonewouldeverusethis7",
             "alexaRank": 1635,
@@ -8218,7 +8218,17 @@
         "Namuwiki": {
             "url": "https://namu.wiki/w/%EC%82%AC%EC%9A%A9%EC%9E%90:{username}",
             "urlMain": "https://namu.wiki/",
-            "checkType": "status_code",
+            "checkType": "message",
+            "presenseStrs": [
+                "<meta property=\"og:title\""
+            ],
+            "absenceStrs": [
+                "새 문서 만들기"
+            ],
+            "regexCheck": "^[\\w\\-_.]+$",
+            "protection": [
+                "cf_js_challenge"
+            ],
             "usernameClaimed": "namu",
             "usernameUnclaimed": "noonewouldeverusethis7",
             "alexaRank": 7047,
@@ -13242,7 +13252,7 @@
                 "ru"
             ],
             "checkType": "response_url",
-            "regexCheck": "^[^-]+$",
+            "regexCheck": "^[A-Za-z0-9_.]+$",
             "alexaRank": 29071,
             "urlMain": "https://studfile.net",
             "url": "https://studfile.net/users/{username}/",
@@ -15603,7 +15613,7 @@
             "tags": [
                 "coding"
             ],
-            "regexCheck": "^[^\\.]+$",
+            "regexCheck": "^[A-Za-z0-9_-]+$",
             "checkType": "message",
             "absenceStrs": [
                 "<title>Users - Hacking with Swift</title>"
@@ -17096,7 +17106,7 @@
             "tags": [
                 "hacking"
             ],
-            "regexCheck": "^[^\\.]+$",
+            "regexCheck": "^[A-Za-z0-9_-]+$",
             "checkType": "message",
             "absenceStrs": [
                 "Cannot Retrieve Information For The Specified Username"
@@ -17556,7 +17566,7 @@
             "errors": {
                 "An error has occurred.": "Site error"
             },
-            "regexCheck": "^[^\\.]+$",
+            "regexCheck": "^[A-Za-z0-9_-]+$",
             "checkType": "message",
             "absenceStrs": [
                 "No such user."
@@ -20680,7 +20690,7 @@
             "tags": [
                 "ru"
             ],
-            "regexCheck": "^[^\\.]+$",
+            "regexCheck": "^[A-Za-z0-9_-]+$",
             "checkType": "message",
             "absenceStrs": [
                 "Указанный пользователь не найден"
@@ -20812,7 +20822,7 @@
             "tags": [
                 "hu"
             ],
-            "regexCheck": "^[^\\.]+$",
+            "regexCheck": "^[A-Za-z0-9_-]+$",
             "checkType": "message",
             "absenceStrs": [
                 "<title>Log in - Chan4Chan</title>"
diff --git a/maigret/resources/db_meta.json b/maigret/resources/db_meta.json
index c5202f5..ea95772 100644
--- a/maigret/resources/db_meta.json
+++ b/maigret/resources/db_meta.json
@@ -1,8 +1,8 @@
 {
     "version": 1,
-    "updated_at": "2026-05-16T19:48:44Z",
+    "updated_at": "2026-05-17T08:44:03Z",
     "sites_count": 3155,
     "min_maigret_version": "0.6.1",
-    "data_sha256": "0997b68c05eedb6e714432ed79580688d4923c56ef1ebf46db69b90039ef00d7",
+    "data_sha256": "896a15cfb0de131848de5ae915a81d60d9d86a3e4537dc1004adeab29ceb4b43",
     "data_url": "https://raw.githubusercontent.com/soxoj/maigret/main/maigret/resources/data.json"
 }
\ No newline at end of file
diff --git a/sites.md b/sites.md
index 2a68a70..4c1ca25 100644
--- a/sites.md
+++ b/sites.md
@@ -3159,16 +3159,16 @@ Rank data fetched from Majestic Million by domains.
 1. ![](https://www.google.com/s2/favicons?domain=https://greasyfork.org) [GreasyFork (https://greasyfork.org)](https://greasyfork.org)*: top 100M, coding*
 1. ![](https://www.google.com/s2/favicons?domain=https://faceit.com/) [Faceit (https://faceit.com/)](https://faceit.com/)*: top 100M, gaming*
 
-The list was updated at (2026-05-15)
+The list was updated at (2026-05-17)
 ## Statistics
 
 Enabled/total sites: 2522/3155 = 79.94%
 
 Incomplete message checks: 311/2522 = 12.33% (false positive risks)
 
-Status code checks: 635/2522 = 25.18% (false positive risks)
+Status code checks: 634/2522 = 25.14% (false positive risks)
 
-False positive risk (total): 37.51%
+False positive risk (total): 37.47%
 
 Sites with probing: 500px, Armchairgm, BinarySearch (disabled), BleachFandom, Bluesky, BongaCams, Boosty, BuyMeACoffee, Calendly, Cent, Chess, Code Sandbox (disabled), Code Snippet Wiki, DailyMotion, Discord, Diskusjon.no, Disqus, Docker Hub, Duolingo, Faceit, FandomCommunityCentral, GitHub, GitLab, Google Plus (archived), Gravatar, HackTheBox, Hackerrank, Hashnode, Holopin, Imgur, Issuu, Keybase, Kick, Kvinneguiden, LeetCode, Lesswrong, Livejasmin, LocalCryptos (disabled), Medium, MicrosoftLearn, MixCloud, Monkeytype, NPM, Niftygateway, Omg.lol, OnlyFans, Paragraph, Picsart, Plurk, Polarsteps, Rarible, Reddit, Reddit Search (Pushshift) (disabled), Revolut.me, RoyalCams, Scratch, Soop, SportsTracker, Spotify, StackOverflow, Substack, TAP'D, Topcoder, Trello, Twitch, Twitter, Twitter Shadowban (disabled), UnstoppableDomains, Vimeo, Vivino, Warframe Market, Warpcast, Weibo, Wikipedia, Yapisal (disabled), YouNow, en.brickimedia.org, forums.grandstream.com, nightbot, notabug.org, qiwi.me (disabled)