diff --git a/src/apps/fido_u2f/__init__.py b/src/apps/fido_u2f/__init__.py
index 66b2900c..d2a0939b 100644
--- a/src/apps/fido_u2f/__init__.py
+++ b/src/apps/fido_u2f/__init__.py
@@ -401,7 +401,7 @@ class ConfirmContent(ui.Widget):
         self.boot()
 
     def boot(self) -> None:
-        import ubinascii
+        from ubinascii import hexlify
         from trezor import res
         from . import knownapps
 
@@ -418,7 +418,7 @@ class ConfirmContent(ui.Widget):
             except FileNotFoundError:
                 icon = res.load('apps/fido_u2f/res/u2f_generic.toif')
         else:
-            name = '%s...%s' % (ubinascii.hexlify(app_id[:4]), ubinascii.hexlify(app_id[-4:]))
+            name = '%s...%s' % (hexlify(app_id[:4]).decode(), hexlify(app_id[-4:]).decode())
             icon = res.load('apps/fido_u2f/res/u2f_generic.toif')
         self.app_name = name
         self.app_icon = icon
diff --git a/src/apps/management/reset_device.py b/src/apps/management/reset_device.py
index 0e5f2fa6..fdea7bc1 100644
--- a/src/apps/management/reset_device.py
+++ b/src/apps/management/reset_device.py
@@ -2,7 +2,7 @@ from micropython import const
 from trezor import wire, ui
 from trezor.ui.container import Container
 from trezor.utils import unimport, chunks
-import ubinascii
+from ubinascii import hexlify
 
 if __debug__:
     internal_entropy = None
@@ -37,8 +37,8 @@ async def layout_reset_device(ctx, msg):
     internal_entropy = random.bytes(32)
 
     if msg.display_random:
-        entropy_lines = chunks(ubinascii.hexlify(internal_entropy), 16)
-        entropy_content = Text('Internal entropy', ui.ICON_RESET, *entropy_lines)
+        entropy_lines = chunks(hexlify(internal_entropy).decode(), 16)
+        entropy_content = Text('Internal entropy', ui.ICON_RESET, ui.MONO, *entropy_lines)
         await require_confirm(ctx, entropy_content, ButtonRequestType.ResetDevice)
 
     if msg.pin_protection: