diff --git a/src/cmd_pgpcardlist.rs b/src/cmd_pgpcardlist.rs
index 2f97524..1969e34 100644
--- a/src/cmd_pgpcardlist.rs
+++ b/src/cmd_pgpcardlist.rs
@@ -19,11 +19,12 @@ impl Command for CommandImpl {
         let json_output = sub_arg_matches.is_present("json");
         if json_output { rust_util::util_msg::set_logger_std_out(false); }
 
-        let mut json = BTreeMap::new();
+        let mut jsons = vec![];
         let cards = opt_result!(PcscBackend::cards(None), "Failed to list OpenPGP cards: {}");
 
         information!("Found {} card(s)", cards.len());
         for (i, mut card) in cards.into_iter().enumerate() {
+            let mut json = BTreeMap::new();
             let mut pgp = OpenPgp::new(&mut card);
             let mut trans = opt_result!(pgp.transaction(), "Open card failed: {}");
             if let Ok(application_related_data) = trans.application_related_data() {
@@ -119,10 +120,11 @@ impl Command for CommandImpl {
                     }
                 }
             }
+            jsons.push(json);
         }
 
         if json_output {
-            println!("{}", serde_json::to_string_pretty(&json).unwrap());
+            println!("{}", serde_json::to_string_pretty(&jsons).unwrap());
         }
         Ok(None)
     }