diff --git a/sartorius_logger/__init__.py b/sartorius_logger/__init__.py
index 6e954ca..ed7f8cf 100644
--- a/sartorius_logger/__init__.py
+++ b/sartorius_logger/__init__.py
@@ -18,7 +18,7 @@ from .parsers import parse_cli_arguments, parse_gui_arguments
 
 try:
     from gooey import Gooey
-except ImportError as exc:
+except ImportError:
 
     def Gooey(*args, **kargs):
         msg = "The graphilcal user interface must be installed separately"
@@ -98,7 +98,8 @@ def gooey_progress_factory(settings):
     total = settings.measurements
     print(
         (
-            f"measuring every {settings.interval.value}{settings.interval.unit} "
+            f"measuring every "
+            f"{settings.interval.value}{settings.interval.unit} "
             f"for {settings.duration.value}{settings.duration.unit}"
         )
     )
@@ -200,7 +201,7 @@ def cli():
 
 @Gooey(
     program_name="SartoriusLogger",
-    progress_regex="^measurement (?P<current>\d+) of (?P<total>\d+)",
+    progress_regex=r"^measurement (?P<current>\d+) of (?P<total>\d+)",
     progress_expr="current / total * 100",
 )
 def gui():