diff --git a/sdk/src/client/builder.rs b/sdk/src/client/builder.rs
index fc5026fb18..576042a576 100644
--- a/sdk/src/client/builder.rs
+++ b/sdk/src/client/builder.rs
@@ -310,7 +310,7 @@ impl ClientBuilder {
                     sender: RwLock::new(mqtt_event_tx),
                     receiver: RwLock::new(mqtt_event_rx),
                 },
-                last_sync: std::sync::Mutex::new(None),
+                last_sync: tokio::sync::Mutex::new(None),
             }),
         };
 
diff --git a/sdk/src/client/core.rs b/sdk/src/client/core.rs
index 9d4830e6ca..fb34c5764c 100644
--- a/sdk/src/client/core.rs
+++ b/sdk/src/client/core.rs
@@ -55,7 +55,7 @@ pub struct ClientInner {
     #[cfg(feature = "mqtt")]
     pub(crate) mqtt: MqttInner,
     #[cfg(target_family = "wasm")]
-    pub(crate) last_sync: std::sync::Mutex<Option<u32>>,
+    pub(crate) last_sync: tokio::sync::Mutex<Option<u32>>,
 }
 
 #[derive(Default)]
@@ -107,7 +107,7 @@ impl ClientInner {
         #[cfg(target_family = "wasm")]
         {
             let current_time = crate::utils::unix_timestamp_now().as_secs() as u32;
-            if let Some(last_sync) = *self.last_sync.lock().unwrap() {
+            if let Some(last_sync) = *self.last_sync.lock().await {
                 if current_time < last_sync {
                     return Ok(self.network_info.read().await.clone());
                 }
@@ -115,7 +115,7 @@ impl ClientInner {
             let info = self.get_info().await?.node_info;
             let mut client_network_info = self.network_info.write().await;
             client_network_info.protocol_parameters = info.protocol.clone();
-            *self.last_sync.lock().unwrap() = Some(current_time + CACHE_NETWORK_INFO_TIMEOUT_IN_SECONDS);
+            *self.last_sync.lock().await = Some(current_time + CACHE_NETWORK_INFO_TIMEOUT_IN_SECONDS);
         }
 
         Ok(self.network_info.read().await.clone())