diff --git a/Cargo.toml b/Cargo.toml
index b49c86e7..7faec001 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ members = [
 [dependencies]
 http = "0.2.0"
 headers-core = { version = "0.2", path = "./headers-core" }
-base64 = "0.13"
+base64 = "0.20"
 bitflags = "1.0"
 bytes = "1"
 mime = "0.3.14"
diff --git a/src/common/authorization.rs b/src/common/authorization.rs
index 734bc6e2..0292eb25 100644
--- a/src/common/authorization.rs
+++ b/src/common/authorization.rs
@@ -1,6 +1,5 @@
 //! Authorization header and types.
 
-use base64;
 use bytes::Bytes;
 
 use util::HeaderValueString;
@@ -168,8 +167,10 @@ impl Credentials for Basic {
     }
 
     fn encode(&self) -> HeaderValue {
+        const ENGINE: base64::engine::fast_portable::FastPortable = base64::engine::DEFAULT_ENGINE;
+
         let mut encoded = String::from("Basic ");
-        base64::encode_config_buf(&self.decoded, base64::STANDARD, &mut encoded);
+        base64::encode_engine_string(&self.decoded, &mut encoded, &ENGINE);
 
         let bytes = Bytes::from(encoded);
         HeaderValue::from_maybe_shared(bytes)