diff --git a/app/common.h b/app/common.h
index e15c77a..f017b10 100644
--- a/app/common.h
+++ b/app/common.h
@@ -15,6 +15,11 @@
 #include <stddef.h>
 #include "hal.h"
 
+typedef struct {
+  uint8_t* data;
+  size_t len;
+} data_t;
+
 #define APP_ALIGNED(x, a) x __attribute__((aligned(a)))
 #define APP_SECTION(x, s) x __attribute__((section(s)))
 #define APP_ALWAYS_INLINE inline __attribute__((always_inline))
diff --git a/app/core/updater.c b/app/core/updater.c
new file mode 100644
index 0000000..0a10c5b
--- /dev/null
+++ b/app/core/updater.c
@@ -0,0 +1,30 @@
+#include "common.h"
+#include "updater.h"
+#include "ethereum/eth_db.h"
+#include "keycard/keycard.h"
+#include "ui/ui.h"
+#include "ur/ur.h"
+
+app_err_t updater_verify_data(data_t* data) {
+  //TODO: verify signature + sanity check
+  return ERR_OK;
+}
+
+void updater_database_run() {
+  data_t data;
+
+  if (ui_qrscan(FS_DATA, &data) != CORE_EVT_UI_OK) {
+    return;
+  }
+
+  if (updater_verify_data(&data) != ERR_OK) {
+    ui_info(INFO_ERROR_TITLE, LSTR(INFO_DB_UPDATE_INVALID), 1);
+    return;
+  }
+
+  if (eth_db_update((fs_entry_t *) data.data, data.len) != ERR_OK) {
+    ui_info(INFO_ERROR_TITLE, LSTR(INFO_DB_UPDATE_ERROR), 1);
+  } else {
+    ui_info(INFO_SUCCESS_TITLE, LSTR(INFO_DB_UPDATE_OK), 1);
+  }
+}
diff --git a/app/core/updater.h b/app/core/updater.h
new file mode 100644
index 0000000..1de1a1f
--- /dev/null
+++ b/app/core/updater.h
@@ -0,0 +1,6 @@
+#ifndef _UPDATER_H_
+#define _UPDATER_H_
+
+void updater_database_run();
+
+#endif
diff --git a/app/ethereum/eth_db.c b/app/ethereum/eth_db.c
index beafcec..7459db8 100644
--- a/app/ethereum/eth_db.c
+++ b/app/ethereum/eth_db.c
@@ -51,6 +51,10 @@ fs_action_t _eth_db_match_erc20(void* ctx, fs_entry_t* entry) {
   return FS_REJECT;
 }
 
+fs_action_t _eth_db_match_all(void* ctx, fs_entry_t* entry) {
+  return ((entry->magic == FS_PAIRING_CHAIN) || (entry->magic == FS_PAIRING_ERC20)) ? FS_REJECT : FS_ACCEPT;
+}
+
 app_err_t eth_db_lookup_chain(chain_desc_t* chain) {
   struct chain_raw_desc* chain_data = (struct chain_raw_desc*) fs_find(_eth_db_match_chain, chain);
 
@@ -78,3 +82,13 @@ app_err_t eth_db_lookup_erc20(erc20_desc_t* erc20) {
 
   return ERR_OK;
 }
+
+app_err_t eth_db_update(fs_entry_t* entries, size_t len) {
+  app_err_t err = fs_erase_all(_eth_db_match_all, NULL);
+
+  if (err != ERR_OK) {
+    return err;
+  }
+
+  return fs_write(entries, len);
+}
diff --git a/app/ethereum/eth_db.h b/app/ethereum/eth_db.h
index e73d62e..7910223 100644
--- a/app/ethereum/eth_db.h
+++ b/app/ethereum/eth_db.h
@@ -20,5 +20,6 @@ typedef struct {
 
 app_err_t eth_db_lookup_chain(chain_desc_t* chain);
 app_err_t eth_db_lookup_erc20(erc20_desc_t* erc20);
+app_err_t eth_db_update(fs_entry_t* entries, size_t len);
 
 #endif
diff --git a/app/qrcode/qrscan.c b/app/qrcode/qrscan.c
index cb83f18..d4bf884 100644
--- a/app/qrcode/qrscan.c
+++ b/app/qrcode/qrscan.c
@@ -39,6 +39,12 @@ app_err_t qrscan_deserialize(ur_t* ur) {
   case ETH_SIGN_REQUEST:
     err = cbor_decode_eth_sign_request(ur->data, ur->data_len, g_ui_cmd.params.qrscan.out, NULL) == ZCBOR_SUCCESS ? ERR_OK : ERR_DATA;
     break;
+  case FS_DATA:
+    data_t* data = g_ui_cmd.params.qrscan.out;
+    data->data = ur->data;
+    data->len = ur->data_len;
+    err = ERR_OK;
+    break;
   default:
     err = ERR_DATA;
     break;
diff --git a/app/tasks/core_task.c b/app/tasks/core_task.c
index fc9dbc0..ccdbb8f 100644
--- a/app/tasks/core_task.c
+++ b/app/tasks/core_task.c
@@ -1,4 +1,5 @@
 #include "core/core.h"
+#include "core/updater.h"
 #include "keycard/keycard.h"
 
 static inline void core_action_run(i18n_str_id_t menu) {
@@ -9,6 +10,9 @@ static inline void core_action_run(i18n_str_id_t menu) {
   case MENU_DISPLAY_PUBLIC:
     core_display_public();
     break;
+  case MENU_DB_UPDATE:
+    updater_database_run();
+    break;
   default:
     //unhandled commands
     break;
diff --git a/app/ui/english.c b/app/ui/english.c
index d7a6d47..0c1ef1a 100644
--- a/app/ui/english.c
+++ b/app/ui/english.c
@@ -47,10 +47,14 @@ const char *const i18n_english_strings[] = {
 
     // Info messages
     "Error",
+    "Success",
     "Communication with the card lost.\n\nPlease remove it and insert it again",
     "The inserted card does not appear to be a Keycard. Please replace it with a Keycard",
     "Initialize your Keycard",
     "We will now proceed initializing your Keycard.\n\nYou will be required to choose a PIN for your card.\n\nPress OK to continue.",
+    "The database update was successful.",
+    "The new database data seems to be invalid.\n Check that you are using the correct site and try again.",
+    "Internal error while writing the new data, please try again.",
 
     // Mnemonic input
     "Seed loading",
diff --git a/app/ui/i18n.h b/app/ui/i18n.h
index 6d8c591..4d15ab6 100644
--- a/app/ui/i18n.h
+++ b/app/ui/i18n.h
@@ -23,7 +23,7 @@ typedef enum {
   MENU_INFO,
   MENU_VERIFY_FW,
   MENU_FW_UPGRADE,
-  MENU_DB_UPGRADE,
+  MENU_DB_UPDATE,
   MENU_BRIGHTNESS,
   MENU_SET_LANG,
 
@@ -50,10 +50,14 @@ typedef enum {
 
   // Info messages
   INFO_ERROR_TITLE,
+  INFO_SUCCESS_TITLE,
   INFO_CARD_ERROR_MSG,
   INFO_NOT_KEYCARD,
   INFO_NEW_CARD_TITLE,
   INFO_NEW_CARD,
+  INFO_DB_UPDATE_OK,
+  INFO_DB_UPDATE_INVALID,
+  INFO_DB_UPDATE_ERROR,
 
   // Mnemonic input
   MNEMO_TITLE,
diff --git a/app/ui/menu.c b/app/ui/menu.c
index f385304..f851aef 100644
--- a/app/ui/menu.c
+++ b/app/ui/menu.c
@@ -23,7 +23,7 @@ const menu_t menu_settings = {
     {MENU_INFO, NULL},
     {MENU_VERIFY_FW, NULL},
     {MENU_FW_UPGRADE, NULL},
-    {MENU_DB_UPGRADE, NULL},
+    {MENU_DB_UPDATE, NULL},
     {MENU_BRIGHTNESS, NULL},
     {MENU_SET_LANG, NULL},
   }
diff --git a/app/ui/ui.c b/app/ui/ui.c
index ca834cd..681f6d6 100644
--- a/app/ui/ui.c
+++ b/app/ui/ui.c
@@ -45,6 +45,14 @@ core_evt_t ui_display_qr(const uint8_t* data, uint32_t len, ur_type_t type) {
   return ui_signal_wait(0);
 }
 
+core_evt_t ui_info(i18n_str_id_t title, const char* msg, uint8_t dismissable) {
+  g_ui_cmd.type = UI_CMD_INFO;
+  g_ui_cmd.params.info.dismissable = 0;
+  g_ui_cmd.params.info.title = title;
+  g_ui_cmd.params.info.msg = msg;
+  return ui_signal_wait(0);
+}
+
 void ui_card_inserted() {
 
 }
@@ -53,30 +61,18 @@ void ui_card_removed() {
 }
 
 void ui_card_transport_error() {
-  g_ui_cmd.type = UI_CMD_INFO;
-  g_ui_cmd.params.info.dismissable = 0;
-  g_ui_cmd.params.info.title = INFO_ERROR_TITLE;
-  g_ui_cmd.params.info.msg = LSTR(INFO_CARD_ERROR_MSG);
-  ui_signal_wait(0);
+  ui_info(INFO_ERROR_TITLE, LSTR(INFO_CARD_ERROR_MSG), 0);
 }
 
 void ui_card_accepted() {
 }
 
 void ui_keycard_wrong_card() {
-  g_ui_cmd.type = UI_CMD_INFO;
-  g_ui_cmd.params.info.dismissable = 0;
-  g_ui_cmd.params.info.title = INFO_ERROR_TITLE;
-  g_ui_cmd.params.info.msg = LSTR(INFO_NOT_KEYCARD);
-  ui_signal_wait(0);
+  ui_info(INFO_ERROR_TITLE, LSTR(INFO_NOT_KEYCARD), 0);
 }
 
 void ui_keycard_not_initialized() {
-  g_ui_cmd.type = UI_CMD_INFO;
-  g_ui_cmd.params.info.dismissable = 1;
-  g_ui_cmd.params.info.title = INFO_NEW_CARD_TITLE;
-  g_ui_cmd.params.info.msg = LSTR(INFO_NEW_CARD);
-  ui_signal_wait(0);
+  ui_info(INFO_NEW_CARD_TITLE, LSTR(INFO_NEW_CARD), 1);
 }
 
 void ui_keycard_init_failed() {
diff --git a/app/ui/ui.h b/app/ui/ui.h
index 332aea3..008fd18 100644
--- a/app/ui/ui.h
+++ b/app/ui/ui.h
@@ -21,6 +21,7 @@ core_evt_t ui_menu(const char* title, const menu_t* menu, i18n_str_id_t* selecte
 core_evt_t ui_display_tx(const txContent_t* tx);
 core_evt_t ui_display_msg(const uint8_t* msg, uint32_t len);
 core_evt_t ui_display_qr(const uint8_t* data, uint32_t len, ur_type_t type);
+core_evt_t ui_info(i18n_str_id_t title, const char* msg, uint8_t dismissable);
 
 void ui_card_inserted();
 void ui_card_removed();