diff --git a/compio/Cargo.toml b/compio/Cargo.toml
index fc4bb4e3..99490858 100644
--- a/compio/Cargo.toml
+++ b/compio/Cargo.toml
@@ -107,6 +107,7 @@ all = [
     "rustls",
     "process",
     "quic",
+    "h3",
 ]
 
 arrayvec = ["compio-buf/arrayvec"]