diff --git a/proxmox-rrd/Cargo.toml b/proxmox-rrd/Cargo.toml
index 0a9c948c..496e1028 100644
--- a/proxmox-rrd/Cargo.toml
+++ b/proxmox-rrd/Cargo.toml
@@ -22,4 +22,4 @@ serde_cbor = "0.11.1"
 #proxmox = { version = "0.15.3" }
 proxmox-time = "1"
 proxmox-schema = { version = "1.3.1", features = [ "api-macro" ] }
-proxmox-sys = "0.3.1"
\ No newline at end of file
+proxmox-sys = "0.4"
\ No newline at end of file