diff --git a/data.json b/data.json
index 47db2f2e..fc0e2301 100644
--- a/data.json
+++ b/data.json
@@ -721,6 +721,16 @@
     "username_claimed": "blue",
     "username_unclaimed": "noonewouldeverusethis7"
   },
+  "OK": {
+    "errorType": "message",
+    "errorMsg": "This page does not exist on OK",
+    "rank": 1,
+    "regexCheck": "^[a-zA-Z][a-zA-Z0-9_-.]*$",
+    "url": "https://ok.ru/{}",
+    "urlMain": "https://ok.ru/",
+    "username_claimed": "ok",
+    "username_unclaimed": "noonewouldeverusethis7"
+  },
   "Pastebin": {
     "errorType": "response_url",
     "errorUrl": "https://pastebin.com/index",
diff --git a/sites.md b/sites.md
index eabd0e6c..0035e88e 100644
--- a/sites.md
+++ b/sites.md
@@ -143,5 +143,6 @@
 142. [boingboing.net](https://boingboing.net/)
 143. [gfycat](https://gfycat.com/)
 144. [Pokemon Showdown](https://pokemonshowdown.com)
+145. [OK](https://ok.ru/)
 
 Alexa.com rank data fetched at (2019-07-11 04:03:04.155602 UTC)