diff --git a/src/async.rs b/src/async.rs
index 2a6cf52..9f8e854 100644
--- a/src/async.rs
+++ b/src/async.rs
@@ -410,7 +410,7 @@ impl<S: Sleeper> AsyncClient<S> {
         let response = self
             .post_request_bytes(
                 "/txs/package",
-                serde_json::to_string(&serialized_txs).unwrap(),
+                serde_json::to_string(&serialized_txs).unwrap_or_default(),
                 Some(queryparams),
             )
             .await?;
diff --git a/src/blocking.rs b/src/blocking.rs
index 23425a4..3e68e6c 100644
--- a/src/blocking.rs
+++ b/src/blocking.rs
@@ -144,7 +144,7 @@ impl BlockingClient {
             }
             Ok(resp) => {
                 let hex_str = resp.as_str().map_err(Error::Minreq)?;
-                let hex_vec = Vec::from_hex(hex_str).unwrap();
+                let hex_vec = Vec::from_hex(hex_str)?;
                 deserialize::<T>(&hex_vec)
                     .map_err(Error::BitcoinEncoding)
                     .map(|r| Some(r))
@@ -162,7 +162,7 @@ impl BlockingClient {
             }
             Ok(resp) => {
                 let hex_str = resp.as_str().map_err(Error::Minreq)?;
-                let hex_vec = Vec::from_hex(hex_str).unwrap();
+                let hex_vec = Vec::from_hex(hex_str)?;
                 deserialize::<T>(&hex_vec).map_err(Error::BitcoinEncoding)
             }
             Err(e) => Err(e),
@@ -332,9 +332,8 @@ impl BlockingClient {
         let mut request = self.post_request(
             "/txs/package",
             serde_json::to_string(&serialized_txs)
-                .unwrap()
-                .as_bytes()
-                .to_vec(),
+                .unwrap_or_default()
+                .into_bytes(),
         )?;
 
         if let Some(maxfeerate) = maxfeerate {