diff --git a/lib/pubspec_updater.dart b/lib/pubspec_updater.dart
index 3534395..fddb0c6 100644
--- a/lib/pubspec_updater.dart
+++ b/lib/pubspec_updater.dart
@@ -164,8 +164,8 @@ class Updater {
   }
 
   Future<String> getLatestVersion(String name) async {
-    final Response response =
-        await get('https://pub.dartlang.org/api/packages/$name');
+    final url = Uri.https('pub.dartlang.org', '/api/packages/$name');
+    final Response response = await get(url);
     final dynamic json = jsonDecode(response.body);
 
     return json['latest']['version'];
diff --git a/pubspec.lock b/pubspec.lock
index d8501e9..3f40828 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,28 +7,28 @@ packages:
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.2"
+    version: "2.3.1"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.0"
-  charcode:
+    version: "2.9.0"
+  characters:
     dependency: transitive
     description:
-      name: charcode
+      name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.2.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.11"
+    version: "1.16.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -40,35 +40,35 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+4"
+    version: "0.13.5"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.3"
-  meta:
+    version: "4.0.2"
+  material_color_utilities:
     dependency: transitive
     description:
-      name: meta
+      name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
-  path:
+    version: "0.1.5"
+  meta:
     dependency: transitive
     description:
-      name: path
+      name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.4"
-  pedantic:
+    version: "1.8.0"
+  path:
     dependency: transitive
     description:
-      name: pedantic
+      name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.0"
+    version: "1.8.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -80,41 +80,41 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.5"
+    version: "1.9.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.1"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.1"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.2"
   yaml:
     dependency: "direct dev"
     description:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "3.1.1"
 sdks:
-  dart: ">=2.4.0 <3.0.0"
+  dart: ">=2.17.0-0 <3.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 1920c0a..7e9073f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -12,9 +12,9 @@ dependencies:
     sdk: flutter
 
 dev_dependencies:
-  http: ^0.12.0+4
-  yaml: ^2.2.0
-  args: ^1.5.2
+  http: ^0.13.5
+  yaml: ^3.1.1
+  args: ^2.3.1
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec