diff --git a/app/build.gradle b/app/build.gradle
index 19e5fd3d..e9552f8a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -38,7 +38,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 30
         versionCode 64
-        versionName "5.1.9-hotfix3"
+        versionName "5.1.9-hotfix4"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }
diff --git a/app/release/output-metadata.json b/app/release/output-metadata.json
index 8e0e95f6..4df15d37 100644
--- a/app/release/output-metadata.json
+++ b/app/release/output-metadata.json
@@ -11,7 +11,7 @@
       "type": "SINGLE",
       "filters": [],
       "versionCode": 64,
-      "versionName": "5.1.9-hotfix3-DEBUG",
+      "versionName": "5.1.9-hotfix4",
       "outputFile": "app-release.apk"
     }
   ]
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
index 31a9d8c5..e7c26b9c 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
@@ -129,7 +129,7 @@ class MainActivity :
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R &&
             !Preferences["download_folder_ignore_warning", false] &&
-            ContextCompat.getExternalFilesDirs(this, null).map { Uri.fromFile(it).toString() }
+            ContextCompat.getExternalFilesDirs(this, null).filterNotNull().map { Uri.fromFile(it).toString() }
                 .contains(Preferences["download_folder", ""])
         ) {
             AlertDialog.Builder(this)