diff --git a/package.json b/package.json
index 126c86a79..0f3a7dc5f 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "vencord",
     "private": "true",
-    "version": "1.15.8",
+    "version": "1.15.9",
     "description": "The cutest Discord client mod",
     "homepage": "https://github.com/Vendicated/Vencord#readme",
     "bugs": {
diff --git a/src/plugins/_core/fixDiscordCss.ts b/src/plugins/_core/fixDiscordCss.ts
index 0f9c8471c..22dd4562c 100644
--- a/src/plugins/_core/fixDiscordCss.ts
+++ b/src/plugins/_core/fixDiscordCss.ts
@@ -8,7 +8,7 @@ import { Devs } from "@utils/constants";
 import { Logger } from "@utils/Logger";
 import definePlugin, { StartAt } from "@utils/types";
 
-let observer: MutationObserver;
+let observer: MutationObserver | null;
 
 function cleanSheet(sheet: CSSStyleSheet) {
     try {
@@ -21,7 +21,8 @@ function cleanSheet(sheet: CSSStyleSheet) {
             if ((rule as CSSStyleRule).selectorText?.includes(":has(.gameOption_")) {
                 new Logger("FixDiscordCss").info("Removed problematic CSS rule", rule.cssText);
                 sheet.deleteRule(i);
-                observer.disconnect();
+                observer!.disconnect();
+                observer = null;
                 break;
             }
         }