diff --git a/modules/openapi-generator/src/main/resources/dart/pubspec.mustache b/modules/openapi-generator/src/main/resources/dart/pubspec.mustache
index a338854b748..ef8fab4bb2a 100644
--- a/modules/openapi-generator/src/main/resources/dart/pubspec.mustache
+++ b/modules/openapi-generator/src/main/resources/dart/pubspec.mustache
@@ -2,4 +2,4 @@ name: {{pubName}}
 version: {{pubVersion}}
 description: {{pubDescription}}
 dependencies:
-  http: '>=0.11.1 <0.12.0'
+  http: '>=0.11.1 <0.13.0'
diff --git a/modules/openapi-generator/src/main/resources/dart2/pubspec.mustache b/modules/openapi-generator/src/main/resources/dart2/pubspec.mustache
index 388572afe62..008cee0b241 100644
--- a/modules/openapi-generator/src/main/resources/dart2/pubspec.mustache
+++ b/modules/openapi-generator/src/main/resources/dart2/pubspec.mustache
@@ -4,4 +4,4 @@ description: {{pubDescription}}
 environment:
   sdk: '>=2.0.0 <3.0.0'
 dependencies:
-  http: '>=0.11.1 <0.12.0'
+  http: '>=0.11.1 <0.13.0'
diff --git a/samples/client/petstore/dart/flutter_petstore/openapi/pubspec.yaml b/samples/client/petstore/dart/flutter_petstore/openapi/pubspec.yaml
index d54efb46a2e..79e5223fcd0 100644
--- a/samples/client/petstore/dart/flutter_petstore/openapi/pubspec.yaml
+++ b/samples/client/petstore/dart/flutter_petstore/openapi/pubspec.yaml
@@ -2,4 +2,4 @@ name: openapi
 version: 1.0.0
 description: OpenAPI API client
 dependencies:
-  http: '>=0.11.1 <0.12.0'
+  http: '>=0.11.1 <0.13.0'
diff --git a/samples/client/petstore/dart/openapi-browser-client/pubspec.yaml b/samples/client/petstore/dart/openapi-browser-client/pubspec.yaml
index d54efb46a2e..79e5223fcd0 100644
--- a/samples/client/petstore/dart/openapi-browser-client/pubspec.yaml
+++ b/samples/client/petstore/dart/openapi-browser-client/pubspec.yaml
@@ -2,4 +2,4 @@ name: openapi
 version: 1.0.0
 description: OpenAPI API client
 dependencies:
-  http: '>=0.11.1 <0.12.0'
+  http: '>=0.11.1 <0.13.0'
diff --git a/samples/client/petstore/dart/openapi/pubspec.yaml b/samples/client/petstore/dart/openapi/pubspec.yaml
index d54efb46a2e..79e5223fcd0 100644
--- a/samples/client/petstore/dart/openapi/pubspec.yaml
+++ b/samples/client/petstore/dart/openapi/pubspec.yaml
@@ -2,4 +2,4 @@ name: openapi
 version: 1.0.0
 description: OpenAPI API client
 dependencies:
-  http: '>=0.11.1 <0.12.0'
+  http: '>=0.11.1 <0.13.0'