diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index aa44c32..c193b91 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -9,7 +9,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  RUST_VERSION: 1.88.0
+  RUST_VERSION: 1.90.0
 
 jobs:
   static_analysis:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cb4a01..a0f0577 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Project Arete SDK Changelog
 
+## [Unreleased]
+### Changed
+- [#96](https://github.com/project-arete/sdk/issues/96) (Rust) Upgrade Rust 1.88.0 → 1.90.0
+
 ## [0.1.6] - 2025-09-26
 ### Added
 - [#90](https://github.com/project-arete/sdk/issues/90) Consumer and Provider classes/structs both require get, put, and watch capabilities
diff --git a/rust/src/client.rs b/rust/src/client.rs
index ad3c4ef..9b26621 100644
--- a/rust/src/client.rs
+++ b/rust/src/client.rs
@@ -134,15 +134,15 @@ impl Client {
                             let mut requests = requests_2.lock().unwrap();
                             if response.is_string() && response.as_str().unwrap_or_default().is_empty() {
                                 requests.insert(transaction, Some(Response { error: None }));
-                            } else if let Value::Object(response) = response {
-                                if let Some(error_msg) = response.get("error") {
-                                    requests.insert(
-                                        transaction,
-                                        Some(Response {
-                                            error: Some(error_msg.to_string()),
-                                        }),
-                                    );
-                                }
+                            } else if let Value::Object(response) = response
+                                && let Some(error_msg) = response.get("error")
+                            {
+                                requests.insert(
+                                    transaction,
+                                    Some(Response {
+                                        error: Some(error_msg.to_string()),
+                                    }),
+                                );
                             }
                         }
                         continue;