diff --git a/.github/workflows/dart.yml b/.github/workflows/dart.yml
index 1ee94ac..c1b445f 100644
--- a/.github/workflows/dart.yml
+++ b/.github/workflows/dart.yml
@@ -23,19 +23,13 @@ jobs:
       - name: Analyze project source
         run: dart analyze --fatal-warnings --fatal-infos --verbose .
 
-      - name: Activate code coverage
-        run: dart pub global activate dart_coveralls
-
-      - name: Analyze code coverage
-        run: dart_coveralls report --debug --exclude-test-files --token=$COVERALLS_REPO_TOKEN test/all_test.dart
-
   test:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        sdk: [stable, 2.17.0]
+        sdk: [stable, 3.0.0]
     steps:
       - uses: actions/checkout@v2
       - uses: dart-lang/setup-dart@v1.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f430ec3..7ad5304 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 3.0.0
+
+* Update Dart DSK version to 3.0.0+
+* Fix PolygonUtil.decode on JavaScript (https://github.com/Dammyololade/flutter_polyline_points/issues/40#issuecomment-751765055)
+
 ## 2.0.1
 
 * Update Dart DSK version up to 2.17.0
diff --git a/README.md b/README.md
index 8c37f5a..ea01b0c 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ In your dart/flutter project add the dependency:
 ```
  dependencies:
    ...
-   maps_toolkit: ^2.0.1
+   maps_toolkit: ^3.0.0
 ```
 
 A simple usage example:
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 028f08f..3f9af52 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -56,13 +56,11 @@ linter:
     - flutter_style_todos
     - hash_and_equals
     - implementation_imports
-    - invariant_booleans
-    - iterable_contains_unrelated_type
+    - collection_methods_unrelated_type
     - join_return_with_assignment
     - library_names
     - library_prefixes
     - lines_longer_than_80_chars
-    - list_remove_unrelated_type
     - literal_only_boolean_expressions
     - no_adjacent_strings_in_list
     - no_duplicate_case_values
@@ -87,7 +85,6 @@ linter:
     - prefer_const_literals_to_create_immutables
     - prefer_constructors_over_static_methods
     - prefer_contains
-    - prefer_equal_for_default_values
     - prefer_expression_function_bodies
     - prefer_final_fields
     - prefer_final_in_for_each
@@ -147,7 +144,3 @@ linter:
     # - use_to_and_as_if_applicable
     - valid_regexps
     - void_checks
-
-analyzer:
-  strong-mode:
-    implicit-casts: false
diff --git a/lib/src/polygon_util.dart b/lib/src/polygon_util.dart
index d131aaa..f071b1e 100644
--- a/lib/src/polygon_util.dart
+++ b/lib/src/polygon_util.dart
@@ -440,7 +440,6 @@ class PolygonUtil {
     return SphericalUtil.computeDistanceBetween(p, su);
   }
 
-  /// Decodes an encoded path string into a sequence of LatLngs.
   static List<LatLng> decode(final String encodedPath) {
     final len = encodedPath.length;
 
@@ -451,28 +450,45 @@ class PolygonUtil {
     var lat = 0;
     var lng = 0;
 
+    final big0 = BigInt.from(0);
+    final big0x1f = BigInt.from(0x1f);
+    final big0x20 = BigInt.from(0x20);
+
     while (index < len) {
-      var result = 1;
       var shift = 0;
-      int b1;
+      BigInt b, result;
+      result = big0;
       do {
-        b1 = encodedPath.codeUnitAt(index++) - 63 - 1;
-        result += b1 << shift;
+        b = BigInt.from(encodedPath.codeUnitAt(index++) - 63);
+        result |= (b & big0x1f) << shift;
         shift += 5;
-      } while (b1 >= 0x1f);
-      lat += (result & 1) != 0 ? ~(result >> 1) : (result >> 1);
+      } while (b >= big0x20);
+      var rShifted = result >> 1;
+      int dLat;
+      if (result.isOdd) {
+        dLat = (~rShifted).toInt();
+      } else {
+        dLat = rShifted.toInt();
+      }
+      lat += dLat;
 
-      result = 1;
       shift = 0;
-      int b2;
+      result = big0;
       do {
-        b2 = encodedPath.codeUnitAt(index++) - 63 - 1;
-        result += b2 << shift;
+        b = BigInt.from(encodedPath.codeUnitAt(index++) - 63);
+        result |= (b & big0x1f) << shift;
         shift += 5;
-      } while (b2 >= 0x1f);
-      lng += (result & 1) != 0 ? ~(result >> 1) : (result >> 1);
+      } while (b >= big0x20);
+      rShifted = result >> 1;
+      int dlng;
+      if (result.isOdd) {
+        dlng = (~rShifted).toInt();
+      } else {
+        dlng = rShifted.toInt();
+      }
+      lng += dlng;
 
-      path.add(LatLng(lat * 1e-5, lng * 1e-5));
+      path.add(LatLng((lat / 1E5).toDouble(), (lng / 1E5).toDouble()));
     }
 
     return path;
diff --git a/pubspec.yaml b/pubspec.yaml
index 23e8132..8aca457 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,13 +1,13 @@
 name: maps_toolkit
 description: Maps toolkit - geo-measurements utils - area of polygon, distance between point, heading and offset between points (port of SphericalUtil, PolyUtil from `android-maps-utils`).
-version: 2.0.1
+version: 3.0.0
 homepage: https://github.com/kb0/maps_toolkit/
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
 
 dev_dependencies:
-  lints: ^2.0.0
-  test: ^1.21.0
+  lints: 2.1.1
+  test: 1.24.6