diff --git a/src/hooks/useDarkMode.ts b/src/hooks/useDarkMode.ts
index 28c428ce..94a420ab 100644
--- a/src/hooks/useDarkMode.ts
+++ b/src/hooks/useDarkMode.ts
@@ -18,10 +18,10 @@ export const useDarkModeListener = () => {
     const isDarkMode = theme === "dark"
     const colorScheme = isDarkMode ? COLOR_SCHEME_DARK : COLOR_SCHEME_LIGHT
     const date = new Date()
-    date.setMonth(date.getMonth() + 1)
+    date.setFullYear(date.getFullYear() + 10)
     document.cookie = IS_DEV
       ? `color_scheme=${colorScheme};`
-      : `color_scheme=${colorScheme}; Domain=.${OUR_DOMAIN}; Path=/; Secure; expires=${date.toUTCString()}`
+      : `color_scheme=${colorScheme}; Domain=.${OUR_DOMAIN}; Path=/; expires=${date.toUTCString()}`
   }, [theme, systemTheme])
 }
 
diff --git a/src/lib/i18n/client.ts b/src/lib/i18n/client.ts
index 3b644720..04082c89 100644
--- a/src/lib/i18n/client.ts
+++ b/src/lib/i18n/client.ts
@@ -11,6 +11,8 @@ import { Trans as TransW } from "react-i18next/TransWithoutContext"
 
 import { useLang } from "~/hooks/useLang"
 
+import { IS_DEV } from "../constants"
+import { OUR_DOMAIN } from "../env"
 import { defaultNS, getOptions, languageNames, languages } from "./settings"
 
 i18next
@@ -40,12 +42,17 @@ export function isLanguageAuto() {
 }
 
 export function changeLanguage(language: string) {
+  let date
   if (language === "auto") {
-    document.cookie =
-      "preferred_language=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;"
+    language = ""
+    date = new Date("Thu, 01 Jan 1970 00:00:00 UTC")
   } else {
-    document.cookie = `preferred_language=${language};`
+    date = new Date()
+    date.setFullYear(date.getFullYear() + 10)
   }
+  document.cookie = IS_DEV
+    ? `preferred_language=${language};`
+    : `preferred_language=${language}; Domain=.${OUR_DOMAIN}; Path=/; expires=${date.toUTCString()}`
   window.location.reload()
 }