diff --git a/lib/src/network/parse_live_query.dart b/lib/src/network/parse_live_query.dart
index 066920f8b..ef8161d13 100644
--- a/lib/src/network/parse_live_query.dart
+++ b/lib/src/network/parse_live_query.dart
@@ -47,7 +47,7 @@ class LiveQuery {
     }
 
     final String _className = query.object.className;
-    query.limiters.clear(); //Remove limites in LiveQuery
+    query.limiters.clear(); //Remove limits in LiveQuery
     final String _where = query._buildQuery().replaceAll('where=', '');
     //Convert where condition to Map
     Map<String, dynamic> _whereMap = Map<String, dynamic>();
@@ -74,7 +74,7 @@ class LiveQuery {
       _channel = IOWebSocketChannel(_webSocket);
       _channel.stream.listen((dynamic message) {
         if (_debug) {
-          print('$_printConstLiveQuery: Listen: ${message}');
+          print('$_printConstLiveQuery: Listen: $message');
         }
 
         final Map<String, dynamic> actionData = jsonDecode(message);
@@ -167,7 +167,7 @@ class LiveQuery {
           print(
               '$_printConstLiveQuery: UnsubscribeMessage: $_unsubscribeMessage');
         }
-        await _channel.sink.add(jsonEncode(_unsubscribeMessage));
+        _channel.sink.add(jsonEncode(_unsubscribeMessage));
         await _channel.sink.close();
       }
     }
diff --git a/lib/src/network/parse_query.dart b/lib/src/network/parse_query.dart
index d32a5c1ea..b352b9a29 100644
--- a/lib/src/network/parse_query.dart
+++ b/lib/src/network/parse_query.dart
@@ -239,7 +239,7 @@ class QueryBuilder<T extends ParseObject> {
 
   // Add a constraint to the query that requires a particular key's value match another QueryBuilder
   void whereMatchesQuery(String column, QueryBuilder query) {
-    String inQuery = query._buildQueryRelational(query.object.className);
+    final String inQuery = query._buildQueryRelational(query.object.className);
 
     queries.add(MapEntry<String, dynamic>(
         _SINGLE_QUERY, '\"$column\":{\"\$inQuery\":$inQuery}'));
@@ -247,7 +247,7 @@ class QueryBuilder<T extends ParseObject> {
 
   //Add a constraint to the query that requires a particular key's value does not match another QueryBuilder
   void whereDoesNotMatchQuery(String column, QueryBuilder query) {
-    String inQuery = query._buildQueryRelational(query.object.className);
+    final String inQuery = query._buildQueryRelational(query.object.className);
 
     queries.add(MapEntry<String, dynamic>(
         _SINGLE_QUERY, '\"$column\":{\"\$notInQuery\":$inQuery}'));
@@ -371,9 +371,9 @@ class QueryBuilder<T extends ParseObject> {
         // Compact all the queries in the correct format
         for (MapEntry<String, dynamic> queryToCompact in listOfQueriesCompact) {
           var queryToCompactValue = queryToCompact.value.toString();
-          queryToCompactValue = queryToCompactValue.replaceFirst("{", "");
+          queryToCompactValue = queryToCompactValue.replaceFirst('{', '');
           queryToCompactValue = queryToCompactValue.replaceRange(
-              queryToCompactValue.length - 1, queryToCompactValue.length, "");
+              queryToCompactValue.length - 1, queryToCompactValue.length, '');
           if (listOfQueriesCompact.first == queryToCompact) {
             queryEnd += queryToCompactValue.replaceAll(queryStart, ' ');
           } else {
diff --git a/lib/src/objects/parse_acl.dart b/lib/src/objects/parse_acl.dart
index 2d3ff2e5e..9e74918bf 100644
--- a/lib/src/objects/parse_acl.dart
+++ b/lib/src/objects/parse_acl.dart
@@ -1,7 +1,7 @@
 part of flutter_parse_sdk;
 
 /// [ParseACL] is used to control which users can access or modify a particular object
-/// [ParseObject] can have its own [ParceACL]
+/// [ParseObject] can have its own [ParseACL]
 /// You can grant read and write permissions separately to specific users
 ///  or you can grant permissions to "the public" so that, for example, any user could read a particular object but
 /// only a particular set of users could write to that object
@@ -125,8 +125,8 @@ class _ACLPermissions {
   _ACLPermissions(this._readPermission, this._writePermission);
   final String _keyReadPermission = 'read';
   final String _keyWritePermission = 'write';
-  bool _readPermission = false;
-  bool _writePermission = false;
+  final bool _readPermission;
+  final bool _writePermission;
 
   bool getReadPermission() {
     return _readPermission;
diff --git a/lib/src/objects/parse_installation.dart b/lib/src/objects/parse_installation.dart
index 008ed79f6..f26330170 100644
--- a/lib/src/objects/parse_installation.dart
+++ b/lib/src/objects/parse_installation.dart
@@ -199,13 +199,15 @@ class ParseInstallation extends ParseObject {
   ///Subscribes the device to a channel of push notifications.
   void subscribeToChannel(String value) {
     final List<dynamic> channel = <String>[value];
-    addUnique('channels', channel);
+    setAddUnique('channels', channel);
+    save();
   }
 
   ///Unsubscribes the device to a channel of push notifications.
   void unsubscribeFromChannel(String value) {
     final List<dynamic> channel = <String>[value];
-    removeAll('channels', channel);
+    setRemove('channels', channel);
+    save();
   }
 
   ///Returns an <List<String>> containing all the channel names this device is subscribed to.
diff --git a/lib/src/objects/parse_object.dart b/lib/src/objects/parse_object.dart
index 6b474fb9a..80f3ac00f 100644
--- a/lib/src/objects/parse_object.dart
+++ b/lib/src/objects/parse_object.dart
@@ -74,7 +74,7 @@ class ParseObject extends ParseBase implements ParseCloneable {
         final Map<String, dynamic> map = json.decode(result.body);
         objectId = map['objectId'].toString();
       }
-      
+
       return handleResponse<ParseObject>(
           this, result, ParseApiRQ.create, _debug, className);
     } on Exception catch (e) {
diff --git a/lib/src/objects/response/parse_response_builder.dart b/lib/src/objects/response/parse_response_builder.dart
index 76b77d6c8..699360c0f 100644
--- a/lib/src/objects/response/parse_response_builder.dart
+++ b/lib/src/objects/response/parse_response_builder.dart
@@ -113,6 +113,6 @@ class _ParseResponseBuilder {
   }
 
   bool isHealthCheck(Response apiResponse) {
-    return apiResponse.body == "{\"status\":\"ok\"}";
+    return apiResponse.body == '{\"status\":\"ok\"}';
   }
 }