diff --git a/client/resources/aid_desfire.json b/client/resources/aid_desfire.json
index c4c658ac0..0a02ea46f 100644
--- a/client/resources/aid_desfire.json
+++ b/client/resources/aid_desfire.json
@@ -1599,6 +1599,14 @@
         "Description": "BIO Barik Card",
         "Type": "transport"
     },
+    {
+        "AID": "F121A0",
+        "Vendor": "Urban Mobility Center",
+        "Country": "BG",
+        "Name": "Sofia Mobile Transit Card",
+        "Description": "DESFire-based mobile transit card",
+        "Type": "transport"
+    },
     {
         "AID": "F20330",
         "Vendor": "NJ Transit via Conduent Inc and G+D GmbH",
diff --git a/client/resources/aidlist.json b/client/resources/aidlist.json
index 6341074a8..cfa549fb1 100644
--- a/client/resources/aidlist.json
+++ b/client/resources/aidlist.json
@@ -2582,6 +2582,19 @@
         "Description": "",
         "Type": "transport"
     },
+    {
+        "AID": "A00000039656434103F121A000000002",
+        "Vendor": "Urban Mobility Center",
+        "Country": "Bulgaria",
+        "Name": "Sofia Mobile Transit Card",
+        "Description": "DESFire-based mobile transit card",
+        "Type": "transport",
+        "Protocol": "mifare_desfire",
+        "Extras": {
+            "AID": "F121A0",
+            "ISOFID": "5677"
+        }
+    },
     {
         "AID": "A00000039656434103F213F000000000",
         "Vendor": "ORCA",