diff --git a/static/webui/index.html b/static/webui/index.html
index eb89f400..416d1978 100644
--- a/static/webui/index.html
+++ b/static/webui/index.html
@@ -267,7 +267,7 @@
                                         <label class="form-label" for="spoofMasteryRank">
                                             Spoofed Mastery Rank (-1 to disable)
                                         </label>
-                                        <input class="form-control" id="spoofMasteryRank" type="number" min="-1" />
+                                        <input class="form-control" id="spoofMasteryRank" type="number" min="-1" max="65535" />
                                     </div>
                                     <button class="btn btn-primary mt-3" type="submit">Save Settings</button>
                                 </form>