diff --git a/zebrad/src/lib.rs b/zebrad/src/lib.rs
index d13de42f..cc825e06 100644
--- a/zebrad/src/lib.rs
+++ b/zebrad/src/lib.rs
@@ -6,6 +6,9 @@
 
 //#![deny(warnings, missing_docs, trivial_casts, unused_qualifications)]
 #![forbid(unsafe_code)]
+// async_await is considered stable on nightly releases, but the corresponding
+// release (1.39.0) is still in beta. Suppress the warning for now.
+#![allow(stable_features)]
 #![feature(async_await)]
 
 #[macro_use]