diff --git a/src/resources/icons/FALLBACK_BG.jpg b/src/resources/icons/FALLBACK_BG.jpg
new file mode 100644
index 0000000..f7c9f21
Binary files /dev/null and b/src/resources/icons/FALLBACK_BG.jpg differ
diff --git a/src/ui/App.tsx b/src/ui/App.tsx
index 9e00a9b..d971e79 100644
--- a/src/ui/App.tsx
+++ b/src/ui/App.tsx
@@ -8,6 +8,9 @@ import { convertFileSrc, invoke } from '@tauri-apps/api/tauri'
 import { Main } from './Main'
 import { Mods } from './Mods'
 
+// From https://www.pixiv.net/en/artworks/93995273
+import FALLBACK_BG from '../resources/icons/FALLBACK_BG.jpg'
+
 interface IState {
   page: string
   bgFile: string
@@ -64,6 +67,18 @@ class App extends React.Component<Readonly<unknown>, IState> {
           this.forceUpdate
         )
       }
+    } else {
+      // Check if api bg is accessible
+      const isDefaultValid = await invoke('valid_url', {
+        url: DEFAULT_BG,
+      })
+
+      this.setState(
+        {
+          bgFile: isDefaultValid ? DEFAULT_BG : FALLBACK_BG,
+        },
+        this.forceUpdate
+      )
     }
 
     window.addEventListener('changePage', (e) => {
diff --git a/src/ui/Main.tsx b/src/ui/Main.tsx
index 19967d0..5886aca 100644
--- a/src/ui/Main.tsx
+++ b/src/ui/Main.tsx
@@ -112,6 +112,10 @@ export class Main extends React.Component<IProps, IState> {
       await setConfigOption('cert_generated', true)
     }
 
+    // Ensure old configs are updated to use RSA
+    const updatedConfig = await getConfigOption('patch_rsa')
+    await setConfigOption('patch_rsa', updatedConfig)
+
     // Period check to only show progress bar when downloading files
     setInterval(() => {
       this.setState({