diff --git a/ethers-providers/src/transports/common.rs b/ethers-providers/src/transports/common.rs
index 747e1405..a23b68d5 100644
--- a/ethers-providers/src/transports/common.rs
+++ b/ethers-providers/src/transports/common.rs
@@ -1,5 +1,6 @@
 // Code adapted from: https://github.com/althea-net/guac_rs/tree/master/web3/src/jsonrpc
 
+use base64::{engine::general_purpose, Engine};
 use ethers_core::types::U256;
 use serde::{
     de::{self, MapAccess, Unexpected, Visitor},
@@ -190,8 +191,10 @@ pub enum Authorization {
 }
 
 impl Authorization {
-    pub fn basic(username: impl Into<String>, password: impl Into<String>) -> Self {
-        let auth_secret = base64::encode(username.into() + ":" + &password.into());
+    pub fn basic(username: impl AsRef<str>, password: impl AsRef<str>) -> Self {
+        let username = username.as_ref();
+        let password = password.as_ref();
+        let auth_secret = general_purpose::STANDARD.encode(format!("{username}:{password}"));
         Self::Basic(auth_secret)
     }