diff --git a/.gitignore b/.gitignore
index 7323d45d..6eb0aef4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@
 *.apk
 *.ap_
 
+.DS_Store
+
 # Files for the dex VM
 *.dex
 
diff --git a/app/src/main/java/dev/ukanth/ufirewall/preferences/SharePreference.java b/app/src/main/java/dev/ukanth/ufirewall/preferences/SharePreference.java
index b155623a..0e233041 100644
--- a/app/src/main/java/dev/ukanth/ufirewall/preferences/SharePreference.java
+++ b/app/src/main/java/dev/ukanth/ufirewall/preferences/SharePreference.java
@@ -44,7 +44,7 @@ public SharePreference(Context context, String authority, String prefName) {
         mContext = context;
         mHandler = new Handler(context.getMainLooper());
         mBaseUri = Uri.parse("content://" + authority).buildUpon().appendPath(prefName).build();
-        mListeners = new WeakHashMap<OnSharedPreferenceChangeListener, PreferenceContentObserver>();
+        mListeners = new WeakHashMap<>();
     }
 
     @Override