diff --git a/src/error.rs b/src/error.rs
index 0d2c17b..849d6e2 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -276,6 +276,7 @@ impl StdError for Error {
         }
     }
 
+    #[allow(deprecated)]
     fn cause(&self) -> Option<&StdError> {
         match self.inner.kind {
             Kind::Http(ref e) => e.cause(),