diff --git a/jsonexample/pubspec.lock b/jsonexample/pubspec.lock
index 784beb5482b..d50cbaab888 100644
--- a/jsonexample/pubspec.lock
+++ b/jsonexample/pubspec.lock
@@ -98,7 +98,7 @@ packages:
       name: built_value_generator
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "8.1.4"
+    version: "8.3.3"
   characters:
     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:
@@ -168,7 +168,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   file:
     dependency: transitive
     description:
@@ -290,7 +290,7 @@ packages:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.4"
   meta:
     dependency: transitive
     description:
@@ -318,7 +318,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   pool:
     dependency: transitive
     description:
@@ -386,7 +386,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.2"
   stack_trace:
     dependency: transitive
     description:
@@ -428,7 +428,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.8"
+    version: "0.4.9"
   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: ">=2.17.0-0 <3.0.0"
diff --git a/jsonexample/pubspec.yaml b/jsonexample/pubspec.yaml
index 1082542f283..4e3f265aa6f 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: ^8.3.3
   json_serializable: ^6.1.5
   flutter_lints: ^1.0.0