diff --git a/public/elotracker/update_puuid.php b/public/elotracker/update_puuid.php
new file mode 100644
index 0000000..bad514d
--- /dev/null
+++ b/public/elotracker/update_puuid.php
@@ -0,0 +1,24 @@
+<?php
+
+require_once __DIR__."/../util/mysql_connect.php";
+require_once __DIR__."/RiotRequest.php";
+
+$conn = new MySQLConnection();
+
+$accounts = $conn->query("SELECT * FROM accounts")->fetch_all(MYSQLI_ASSOC);
+
+foreach ($accounts as $currentAccount) {
+	$gameName = $currentAccount["gameName"];
+	$tagLine = $currentAccount["tagLine"];
+	$request = new RiotRequest("riot/account/v1/accounts/by-riot-id/$gameName/$tagLine");
+	$request->useRouting();
+	$fetchedAccount = $request->run();
+
+	if ($request->responseCode === 200){
+		$conn->prepare("
+			UPDATE accounts
+			SET puuid = ?
+			WHERE puuid = ?
+		")->execute([$fetchedAccount->puuid, $currentAccount["puuid"]]);
+	}
+}
\ No newline at end of file