diff --git a/Cargo.toml b/Cargo.toml
index 939d43d..24501a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,5 +42,5 @@ minimal = []
 debug-calls = []
 proxy = ["byteorder", "winapi", "libc"]
 use-rustls = ["webpki-roots", "rustls/default"]
-use-rustls-ring = ["rustls/ring", "rustls/logging", "rustls/std", "rustls/tls12"]
+use-rustls-ring = ["rustls/ring", "rustls/logging", "rustls/std", "rustls/tls12", "webpki-roots"]
 use-openssl = ["openssl"]