diff --git a/resources/Dockerfile b/resources/Dockerfile
index 9398bfe0e..05e16c08f 100644
--- a/resources/Dockerfile
+++ b/resources/Dockerfile
@@ -1,6 +1,6 @@
 FROM ubuntu:18.04 as dev
 
-ARG RUST_TOOLCHAIN="1.40.0"
+ARG RUST_TOOLCHAIN="1.42.0"
 ARG CLH_SRC_DIR="/cloud-hypervisor"
 ARG CLH_BUILD_DIR="$CLH_SRC_DIR/build"
 ARG CARGO_REGISTRY_DIR="$CLH_BUILD_DIR/cargo_registry"