diff --git a/manim_slides/manim.py b/manim_slides/manim.py
index 5fc756e..97fa217 100644
--- a/manim_slides/manim.py
+++ b/manim_slides/manim.py
@@ -1,5 +1,5 @@
-from importlib.util import find_spec
 import sys
+from importlib.util import find_spec
 
 MANIM_PACKAGE_NAME = "manim"
 MANIM_AVAILABLE = find_spec(MANIM_PACKAGE_NAME) is not None
@@ -11,7 +11,10 @@ MANIMGL_IMPORTED = MANIMGL_PACKAGE_NAME in sys.modules
 
 if MANIM_IMPORTED and MANIMGL_IMPORTED:
     from manim import logger
-    logger.warn("Both manim and manimgl are installed, therefore `manim-slide` needs to need which one to use. Please only import one of the two modules so that `manim-slide` knows which one to use. Here, manim is used by default")
+
+    logger.warn(
+        "Both manim and manimgl are installed, therefore `manim-slide` needs to need which one to use. Please only import one of the two modules so that `manim-slide` knows which one to use. Here, manim is used by default"
+    )
     MANIM = True
     MANIMGL = False
 elif MANIM_AVAILABLE and not MANIMGL_IMPORTED:
@@ -21,7 +24,9 @@ elif MANIMGL_AVAILABLE:
     MANIM = False
     MANIMGL = True
 else:
-    raise ImportError("Either manim (community) or manimgl (3b1b) package must be installed")
+    raise ImportError(
+        "Either manim (community) or manimgl (3b1b) package must be installed"
+    )
 
 
 FFMPEG_BIN = None
diff --git a/manim_slides/present.py b/manim_slides/present.py
index 1aaeedb..fc2bd2e 100644
--- a/manim_slides/present.py
+++ b/manim_slides/present.py
@@ -377,12 +377,16 @@ def present(scenes, config_path, folder, start_paused, fullscreen, last_frame_ne
             indices = list(map(int, value.strip().replace(" ", "").split(",")))
 
             if not all(map(lambda i: 0 < i <= len(scene_choices), indices)):
-                raise click.UsageError("Please only enter numbers displayed on the screen.")
+                raise click.UsageError(
+                    "Please only enter numbers displayed on the screen."
+                )
 
             return [scene_choices[i] for i in indices]
 
         if len(scene_choices) == 0:
-            raise click.UsageError("No scenes were found, are you in the correct directory?")
+            raise click.UsageError(
+                "No scenes were found, are you in the correct directory?"
+            )
 
         while True:
             try: