diff --git a/modules/openapi-generator/src/main/resources/rust/Cargo.mustache b/modules/openapi-generator/src/main/resources/rust/Cargo.mustache
index aa4ad5bdd89..55d75560fd7 100644
--- a/modules/openapi-generator/src/main/resources/rust/Cargo.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/Cargo.mustache
@@ -63,13 +63,13 @@ secrecy = "0.8.0"
 {{^supportAsync}}
 reqwest = { version = "^0.12", features = ["json", "blocking", "multipart"] }
 {{#supportMiddleware}}
-reqwest-middleware = { version = "^0.3", features = ["json", "blocking", "multipart"] }
+reqwest-middleware = { version = "^0.4", features = ["json", "blocking", "multipart"] }
 {{/supportMiddleware}}
 {{/supportAsync}}
 {{#supportAsync}}
 reqwest = { version = "^0.12", features = ["json", "multipart"] }
 {{#supportMiddleware}}
-reqwest-middleware = { version = "^0.3", features = ["json", "multipart"] }
+reqwest-middleware = { version = "^0.4", features = ["json", "multipart"] }
 {{/supportMiddleware}}
 {{#supportTokenSource}}
 async-trait = "^0.1"
@@ -82,7 +82,7 @@ google-cloud-token = "^0.1"
 async-trait = "^0.1"
 reqwest = { version = "^0.12", features = ["json", "multipart"] }
 {{#supportMiddleware}}
-reqwest-middleware = { version = "^0.3", features = ["json", "multipart"] }
+reqwest-middleware = { version = "^0.4", features = ["json", "multipart"] }
 {{/supportMiddleware}}
 {{#supportTokenSource}}
 # TODO: propose to Yoshidan to externalize this as non google related crate, so that it can easily be extended for other cloud providers.
diff --git a/samples/client/petstore/rust/reqwest/petstore-async-middleware/Cargo.toml b/samples/client/petstore/rust/reqwest/petstore-async-middleware/Cargo.toml
index 2bbf314d7e8..fffdc08ec2f 100644
--- a/samples/client/petstore/rust/reqwest/petstore-async-middleware/Cargo.toml
+++ b/samples/client/petstore/rust/reqwest/petstore-async-middleware/Cargo.toml
@@ -14,4 +14,4 @@ serde_repr = "^0.1"
 url = "^2.5"
 uuid = { version = "^1.8", features = ["serde", "v4"] }
 reqwest = { version = "^0.12", features = ["json", "multipart"] }
-reqwest-middleware = { version = "^0.3", features = ["json", "multipart"] }
+reqwest-middleware = { version = "^0.4", features = ["json", "multipart"] }