diff --git a/script/nsfw-warning.js b/script/nsfw-warning.js
index c78d393..4f32770 100644
--- a/script/nsfw-warning.js
+++ b/script/nsfw-warning.js
@@ -4,7 +4,7 @@
 let nsfwOk = 'nsfw-ok';
 
 function alreadyYes() {
-  return sessionStorage.getItem(nsfwOk);
+  return localStorage.getItem(nsfwOk);
 }
 
 function dismiss() {
@@ -13,7 +13,7 @@ function dismiss() {
 }
 
 function yes() {
-  sessionStorage.setItem(nsfwOk, 1);
+  localStorage.setItem(nsfwOk, 1);
   dismiss();
 }