diff --git a/poezio_omemo/__init__.py b/poezio_omemo/__init__.py
index b5967dc..f90473c 100644
--- a/poezio_omemo/__init__.py
+++ b/poezio_omemo/__init__.py
@@ -170,7 +170,7 @@ class Plugin(E2EEPlugin):
             # and given a chance to resolve them already.
             self.display_error('I was not able to decrypt the message.')
         except (Exception,) as exn:
-            self.display_error('An error occured while attempting decryption.\n%r' % exn)
+            self.display_error(f'An error occured while attempting decryption.\n{exn}')
             raise
 
         return None
@@ -215,15 +215,15 @@ class Plugin(E2EEPlugin):
                 for error in exn.errors:
                     if isinstance(error, MissingBundleException):
                         self.display_error(
-                            'Could not find keys for device "%d" of recipient "%s". Skipping.' %
-                            (error.device, error.bare_jid),
+                            f'Could not find keys for device "{error.device}" '
+                            f'of recipient "{error.bare_jid}". Skipping.'
                         )
                         jid = JID(error.bare_jid)
                         device_list = expect_problems.setdefault(jid, [])
                         device_list.append(error.device)
             except (IqError, IqTimeout) as exn:
                 self.display_error(
-                    'An error occured while fetching information on a recipient.\n%r' % exn,
+                    'An error occured while fetching information on a recipient.\n{exn}'
                 )
                 return None