diff --git a/app/src/main/java/com/topjohnwu/magisk/data/repository/ModuleRepository.kt b/app/src/main/java/com/topjohnwu/magisk/data/repository/ModuleRepository.kt
index a9edbfa14..407e3ee1d 100644
--- a/app/src/main/java/com/topjohnwu/magisk/data/repository/ModuleRepository.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/data/repository/ModuleRepository.kt
@@ -12,6 +12,7 @@ import com.topjohnwu.magisk.utils.Utils
 import com.topjohnwu.magisk.utils.toSingle
 import com.topjohnwu.magisk.utils.writeToFile
 import com.topjohnwu.magisk.utils.writeToString
+import io.reactivex.Completable
 import io.reactivex.Single
 
 class ModuleRepository(
@@ -59,7 +60,7 @@ class ModuleRepository(
         .fetchModuleInstaller()
         .map { it.writeToFile(context, FILE_MODULE_INSTALLER_SH) }
 
-    fun deleteAllCached() = repoDao.deleteAll()
+    fun deleteAllCached() = Completable.fromCallable { repoDao.deleteAll() }
 
 
     private fun fetchProperties(module: String, lastChanged: Long) = apiRaw
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.java b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.java
index 4071a8e1d..b8c092d9c 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.java
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsFragment.java
@@ -110,7 +110,9 @@ public final class SettingsFragment extends BasePreferenceFragment {
         Preference clear = findPreference("clear");
         clear.setOnPreferenceClickListener(pref -> {
             getPrefs().edit().remove(Config.Key.ETAG_KEY).apply();
-            getModuleRepo().deleteAllCached();
+            getModuleRepo().deleteAllCached().subscribeOn(Schedulers.io()).subscribe(() -> {
+            }, throwable -> {
+            });
             Utils.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT);
             return true;
         });