diff --git a/firmware/application/src/rfid/nfctag/hf/nfc_mf1.c b/firmware/application/src/rfid/nfctag/hf/nfc_mf1.c
index e06f2ff..872d791 100644
--- a/firmware/application/src/rfid/nfctag/hf/nfc_mf1.c
+++ b/firmware/application/src/rfid/nfctag/hf/nfc_mf1.c
@@ -1141,7 +1141,7 @@ int nfc_tag_mf1_data_loadcb(tag_specific_type_t type, tag_data_buffer_t *buffer)
 // Factory data for initialization of MF1
 bool nfc_tag_mf1_data_factory(uint8_t slot, tag_specific_type_t tag_type) {
     // default mf1 data
-    uint8_t default_blk0[] = { 0xDE, 0xAD, 0xBE, 0xFF, 0x32, 0x08, 0x04, 0x00, 0x01, 0x77, 0xA2, 0xCC, 0x35, 0xAF, 0xA5, 0x1D };
+    uint8_t default_blk0[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0x22, 0x08, 0x04, 0x00, 0x01, 0x77, 0xA2, 0xCC, 0x35, 0xAF, 0xA5, 0x1D };
     uint8_t default_data[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
     uint8_t default_trail[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x07, 0x80, 0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 
@@ -1167,7 +1167,7 @@ bool nfc_tag_mf1_data_factory(uint8_t slot, tag_specific_type_t tag_type) {
     p_mf1_information->res_coll.uid[0] = 0xDE;
     p_mf1_information->res_coll.uid[1] = 0xAD;
     p_mf1_information->res_coll.uid[2] = 0xBE;
-    p_mf1_information->res_coll.uid[3] = 0xFF;
+    p_mf1_information->res_coll.uid[3] = 0xEF;
     p_mf1_information->res_coll.size = NFC_TAG_14A_UID_SINGLE_SIZE;
     p_mf1_information->res_coll.ats.length = 0;