1 files changed, 1 insertions, 1 deletions
diff --git a/src/builder.rs b/src/builder.rs
index 312b499..1f6fc38 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -50,7 +50,7 @@ impl RegistryAuth {
     /// serialize authentication as JSON in base64
     pub fn serialize(&self) -> String {
         serde_json::to_string(self)
-            .map(|c| base64::encode(&c))
+            .map(|c| base64::encode_config(&c, base64::URL_SAFE))
             .unwrap()
     }
 }