diff --git a/Cargo.toml b/Cargo.toml
index 50c60db..fa574c9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0"
 bincode = "1.3"
-clap = { version = "4.0.32", features = ["cargo"] }
+clap = { version = "4.0.32", features = ["cargo", "env"] }
 md5 = "0.7.0"
 scopeguard = "1.1.0"
 serde = "1.0"
diff --git a/src/main.rs b/src/main.rs
index aa76ce1..cce9718 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -27,7 +27,7 @@ fn main() -> Result<()> {
                 .long("fingerprint")
                 .value_name("FINGERPRINT")
                 .help("Proxmox Backup Server Fingerprint")
-                .required(true),
+                .env("PBS_FINGERPRINT"),
         )
         .arg(
             Arg::new("keyfile")
@@ -72,9 +72,10 @@ fn main() -> Result<()> {
 
     let pbs_repository = matches.get_one::<String>("repository").unwrap().to_string();
     let vmid = matches.get_one::<String>("vmid").unwrap().to_string();
+
     let fingerprint = matches
         .get_one::<String>("fingerprint")
-        .unwrap()
+        .context("Fingerprint not set. Use $PBS_FINGERPRINT or --fingerprint")?
         .to_string();
 
     let keyfile = matches.get_one::<String>("keyfile");