diff --git a/modules/openapi-generator/src/main/resources/dart/libraries/dio/analysis_options.mustache b/modules/openapi-generator/src/main/resources/dart/libraries/dio/analysis_options.mustache
index 865b3404b402..b625c648d600 100644
--- a/modules/openapi-generator/src/main/resources/dart/libraries/dio/analysis_options.mustache
+++ b/modules/openapi-generator/src/main/resources/dart/libraries/dio/analysis_options.mustache
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart{{#useJsonSerializable}}
     - lib/{{sourceFolder}}/model/*.g.dart{{/useJsonSerializable}}
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/oneof/analysis_options.yaml
index 139ad7abf559..16a95850087a 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof/analysis_options.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/oneof/analysis_options.yaml
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart
   errors:
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/analysis_options.yaml
index 139ad7abf559..16a95850087a 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/analysis_options.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/analysis_options.yaml
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart
   errors:
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/analysis_options.yaml
index 139ad7abf559..16a95850087a 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/analysis_options.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/analysis_options.yaml
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart
   errors:
diff --git a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/analysis_options.yaml
index ac01482530cc..70524126e3fe 100644
--- a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/analysis_options.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/analysis_options.yaml
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart
     - lib/src/model/*.g.dart
diff --git a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/analysis_options.yaml
index 139ad7abf559..16a95850087a 100644
--- a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/analysis_options.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/analysis_options.yaml
@@ -2,9 +2,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-dynamic: false
-    implicit-casts: false
+    strict-casts: false
   exclude:
     - test/*.dart
   errors: