diff --git a/src/lib.rs b/src/lib.rs
index 62f7e10..e25c09d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::sync::Arc;
 
 use chrono::{DateTime, NaiveTime, Utc};
 use lazy_static::lazy_static;
@@ -104,7 +103,7 @@ pub struct SearchOptions<'a> {
 #[derive(Default)]
 pub struct ClientBuilder {
     api_key: Option<String>,
-    custom_request: Option<Arc<Callback>>,
+    custom_request: Option<Box<Callback>>,
 }
 
 impl ClientBuilder {
@@ -123,7 +122,7 @@ impl ClientBuilder {
             + Send
             + Sync,
     {
-        self.custom_request = Some(Arc::new(callback));
+        self.custom_request = Some(Box::new(callback));
 
         self
     }
@@ -132,46 +131,18 @@ impl ClientBuilder {
     pub fn build(self) -> Client {
         let notion_api_key = self.api_key.expect("api_key to be set");
 
-        let request_handler =
-            self.custom_request
-                .unwrap_or(Arc::new(|request_builder: surf::RequestBuilder| {
-                    Box::pin(request_builder)
-                }));
-
-        let http_client = Arc::from(get_http_client(&notion_api_key));
-
         Client {
-            http_client: http_client.clone(),
-            request_handler: request_handler.clone(),
-
-            pages: Pages {
-                http_client: http_client.clone(),
-                request_handler: request_handler.clone(),
-            },
-            blocks: Blocks {
-                http_client: http_client.clone(),
-                request_handler: request_handler.clone(),
-            },
-            databases: Databases {
-                http_client: http_client.clone(),
-                request_handler: request_handler.clone(),
-            },
-            users: Users {
-                http_client: http_client.clone(),
-                request_handler: request_handler.clone(),
-            },
+            http_client: get_http_client(&notion_api_key),
+            request_handler: self.custom_request.unwrap_or(Box::new(
+                |request_builder: surf::RequestBuilder| Box::pin(request_builder),
+            )),
         }
     }
 }
 
 pub struct Client {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
-
-    pub pages: Pages,
-    pub blocks: Blocks,
-    pub databases: Databases,
-    pub users: Users,
+    http_client: surf::Client,
+    request_handler: Box<Callback>,
 }
 
 impl<'a> Client {
@@ -199,19 +170,46 @@ impl<'a> Client {
             status => Err(Error::Http(status, response)),
         }
     }
+
+    pub fn pages(&'a self) -> Pages<'a> {
+        Pages {
+            http_client: &self.http_client,
+            request_handler: &self.request_handler,
+        }
+    }
+
+    pub fn blocks(&'a self) -> Blocks<'a> {
+        Blocks {
+            http_client: &self.http_client,
+            request_handler: &self.request_handler,
+        }
+    }
+
+    pub fn databases(&'a self) -> Databases<'a> {
+        Databases {
+            http_client: &self.http_client,
+            request_handler: &self.request_handler,
+        }
+    }
+
+    pub fn users(&'a self) -> Users<'a> {
+        Users {
+            http_client: &self.http_client,
+            request_handler: &self.request_handler,
+        }
+    }
 }
 
 pub struct PageOptions<'a> {
     pub page_id: &'a str,
 }
 
-#[derive(Clone)]
-pub struct Pages {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
+pub struct Pages<'a> {
+    http_client: &'a surf::Client,
+    request_handler: &'a Box<Callback>,
 }
 
-impl Pages {
+impl Pages<'_> {
     pub async fn retrieve(&self, options: PageOptions<'_>) -> Result<Page> {
         let url = format!(
             "https://api.notion.com/v1/pages/{page_id}",
@@ -228,31 +226,30 @@ impl Pages {
     }
 }
 
-#[derive(Clone)]
-pub struct Blocks {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
+pub struct Blocks<'a> {
+    http_client: &'a surf::Client,
+    request_handler: &'a Box<Callback>,
 }
 
-impl Blocks {
+impl Blocks<'_> {
     pub fn children(&self) -> BlockChildren {
         BlockChildren {
-            http_client: self.http_client.clone(),
-            request_handler: self.request_handler.clone(),
+            http_client: self.http_client,
+            request_handler: self.request_handler,
         }
     }
 }
 
-pub struct BlockChildren {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
+pub struct BlockChildren<'a> {
+    http_client: &'a surf::Client,
+    request_handler: &'a Box<Callback>,
 }
 
 pub struct BlockChildrenListOptions<'a> {
     pub block_id: &'a str,
 }
 
-impl BlockChildren {
+impl BlockChildren<'_> {
     pub async fn list(
         &self,
         options: BlockChildrenListOptions<'_>,
@@ -273,13 +270,12 @@ impl BlockChildren {
     }
 }
 
-#[derive(Clone)]
-pub struct Databases {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
+pub struct Databases<'a> {
+    http_client: &'a surf::Client,
+    request_handler: &'a Box<Callback>,
 }
 
-impl Databases {
+impl Databases<'_> {
     pub async fn query<'a>(
         &self,
         options: DatabaseQueryOptions<'a>,
@@ -344,7 +340,7 @@ mod tests {
 
     #[async_std::test]
     async fn check_database_query() {
-        let databases = Client::new()
+        let _ = Client::new()
             .api_key("secret_FuhJkAoOVZlk8YUT9ZOeYqWBRRZN6OMISJwhb4dTnud")
             .build()
             .search::<Database>(SearchOptions {
@@ -364,10 +360,10 @@ mod tests {
 
     #[async_std::test]
     async fn test_blocks() {
-        let blocks = Client::new()
+        let _ = Client::new()
             .api_key("secret_FuhJkAoOVZlk8YUT9ZOeYqWBRRZN6OMISJwhb4dTnud")
             .build()
-            .blocks
+            .blocks()
             .children()
             .list(BlockChildrenListOptions {
                 block_id: "0d253ab0f751443aafb9bcec14012897",
@@ -385,13 +381,12 @@ pub struct DatabaseQueryOptions<'a> {
     pub start_cursor: Option<String>,
 }
 
-#[derive(Clone)]
-pub struct Users {
-    http_client: Arc<surf::Client>,
-    request_handler: Arc<Callback>,
+pub struct Users<'a> {
+    http_client: &'a surf::Client,
+    request_handler: &'a Box<Callback>,
 }
 
-impl Users {
+impl Users<'_> {
     pub async fn get(&self) -> Result<QueryResponse<User>> {
         let url = "https://api.notion.com/v1/users".to_owned();