diff --git a/jsonexample/pubspec.lock b/jsonexample/pubspec.lock
index 784beb5482b..a649f4c012c 100644
--- a/jsonexample/pubspec.lock
+++ b/jsonexample/pubspec.lock
@@ -7,14 +7,14 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "38.0.0"
+    version: "47.0.0"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.4.1"
+    version: "4.7.0"
   args:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -42,7 +42,7 @@ packages:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "2.3.1"
   build_config:
     dependency: transitive
     description:
@@ -56,21 +56,21 @@ packages:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.1"
+    version: "3.1.0"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.6"
+    version: "2.0.10"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.8"
+    version: "2.1.11"
   build_runner_core:
     dependency: transitive
     description:
@@ -98,14 +98,14 @@ packages:
       name: built_value_generator
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "8.1.4"
+    version: "8.4.2"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   charcode:
     dependency: transitive
     description:
@@ -126,7 +126,7 @@ packages:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   code_builder:
     dependency: transitive
     description:
@@ -140,7 +140,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   convert:
     dependency: transitive
     description:
@@ -161,14 +161,14 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.2"
+    version: "2.2.4"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   file:
     dependency: transitive
     description:
@@ -262,7 +262,7 @@ packages:
       name: json_serializable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.5"
+    version: "6.1.6"
   lints:
     dependency: transitive
     description:
@@ -283,21 +283,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.12"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   mime:
     dependency: transitive
     description:
@@ -318,7 +318,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.2"
   pool:
     dependency: transitive
     description:
@@ -372,21 +372,21 @@ packages:
       name: source_gen
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.1"
+    version: "1.2.6"
   source_helper:
     dependency: transitive
     description:
       name: source_helper
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.3"
   source_span:
     dependency: transitive
     description:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -414,21 +414,21 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.8"
+    version: "0.4.12"
   timing:
     dependency: transitive
     description:
@@ -449,7 +449,7 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   watcher:
     dependency: transitive
     description:
@@ -481,4 +481,4 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.16.0 <3.0.0"
+  dart: ">=2.17.0 <3.0.0"
diff --git a/jsonexample/pubspec.yaml b/jsonexample/pubspec.yaml
index 1082542f283..84845e59e01 100644
--- a/jsonexample/pubspec.yaml
+++ b/jsonexample/pubspec.yaml
@@ -22,7 +22,7 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   build_runner: ^2.0.4
-  built_value_generator: ^8.0.0
+  built_value_generator: ^8.4.2
   json_serializable: ^6.1.5
   flutter_lints: ^1.0.0