diff --git a/quinn-h3/Cargo.toml b/quinn-h3/Cargo.toml
index b29e0c7e7..2b94dec08 100644
--- a/quinn-h3/Cargo.toml
+++ b/quinn-h3/Cargo.toml
@@ -47,7 +47,7 @@ slog-term = "2"
 structopt = "0.2.7"
 tokio-current-thread = "0.1"
 url = "1.7"
-rcgen = "0.2"
+rcgen = "0.3"
 directories = "1.0.2"
 rand = "0.6.5"