diff --git a/artiq/firmware/runtime/Cargo.toml b/artiq/firmware/runtime/Cargo.toml
index 8a125a1dc..d06060233 100644
--- a/artiq/firmware/runtime/Cargo.toml
+++ b/artiq/firmware/runtime/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.0.0"
 build = "build.rs"
 
 [build-dependencies]
-walkdir = "0.1"
+walkdir = "1.0"
 
 [lib]
 name = "runtime"