diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..cc99296
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,2 @@
+[flake8]
+select = E3, E4, F
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1d6de8c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,16 @@
+name: ci
+
+on: [ push, pull_request ]
+
+jobs:
+ lint:
+  runs-on: ubuntu-latest
+  steps:
+  - name: Checkout
+    uses: actions/checkout@v2
+  - name: Set up Python 3.8
+    uses: actions/setup-python@v2
+    with:
+     python-version: 3.8
+  - run: pip install flake8
+  - run: flake8 run.py core
diff --git a/core/globals.py b/core/globals.py
index 65d3283..3525c9d 100644
--- a/core/globals.py
+++ b/core/globals.py
@@ -1,4 +1,3 @@
-import torch
 import onnxruntime
 
 use_gpu = False
diff --git a/core/processor.py b/core/processor.py
index 398431d..26cb3df 100644
--- a/core/processor.py
+++ b/core/processor.py
@@ -3,7 +3,6 @@ import os
 import cv2
 import insightface
 from core.config import get_face
-from core.utils import rreplace
 
 FACE_SWAPPER = None
 
@@ -28,7 +27,7 @@ def process_video(source_img, frame_paths):
                 print('.', end='', flush=True)
             else:
                 print('S', end='', flush=True)
-        except Exception as e:
+        except Exception:
             print('E', end='', flush=True)
             pass
 
diff --git a/core/utils.py b/core/utils.py
index 66dab65..419d178 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -47,11 +47,11 @@ def extract_frames(input_path, output_dir):
 def add_audio(output_dir, target_path, keep_frames, output_file):
     video = target_path.split("/")[-1]
     video_name = video.split(".")[0]
-    save_to = output_file if output_file else output_dir + f"/swapped-" + video_name + ".mp4"
+    save_to = output_file if output_file else output_dir + "/swapped-" + video_name + ".mp4"
     save_to_ff, output_dir_ff = path(save_to), path(output_dir)
     os.system(f'ffmpeg -i "{output_dir_ff}{sep}output.mp4" -i "{output_dir_ff}{sep}{video}" -c:v copy -map 0:v:0 -map 1:a:0 -y "{save_to_ff}"')
     if not os.path.isfile(save_to):
-        shutil.move(output_dir + f"/output.mp4", save_to)
+        shutil.move(output_dir + "/output.mp4", save_to)
     if not keep_frames:
         shutil.rmtree(output_dir)
 
diff --git a/run.py b/run.py
old mode 100644
new mode 100755
index af45389..e169f39
--- a/run.py
+++ b/run.py
@@ -58,7 +58,7 @@ def limit_resources():
 
 def pre_check():
     if sys.version_info < (3, 8):
-        quit(f'Python version is not supported - please upgrade to 3.8 or higher')
+        quit('Python version is not supported - please upgrade to 3.8 or higher')
     if not shutil.which('ffmpeg'):
         quit('ffmpeg is not installed!')
     model_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'inswapper_128.onnx')
@@ -72,7 +72,7 @@ def pre_check():
             if not torch.cuda.is_available() or not CUDA_VERSION:
                 quit("You are using --gpu flag but CUDA isn't available or properly installed on your system.")
             if CUDA_VERSION > '11.8':
-                quit(f"CUDA version {CUDA_VERSION} is not supported - please downgrade to 11.8.")
+                quit(f"CUDA version {CUDA_VERSION} is not supported - please downgrade to 11.8")
             if CUDA_VERSION < '11.4':
                 quit(f"CUDA version {CUDA_VERSION} is not supported - please upgrade to 11.8")
             if CUDNN_VERSION < 8220:
@@ -179,7 +179,8 @@ def start():
         print("\n[WARNING] Please select a video/image to swap face in.")
         return
     if not args['output_file']:
-        args['output_file'] = rreplace(args['target_path'], "/", "/swapped-", 1) if "/" in target_path else "swapped-"+target_path
+        target_path = args['target_path']
+        args['output_file'] = rreplace(target_path, "/", "/swapped-", 1) if "/" in target_path else "swapped-" + target_path
     global pool
     pool = mp.Pool(args['cores_count'])
     target_path = args['target_path']
@@ -206,7 +207,7 @@ def start():
     status("extracting frames...")
     extract_frames(target_path, output_dir)
     args['frame_paths'] = tuple(sorted(
-        glob.glob(output_dir + f"/*.png"),
+        glob.glob(output_dir + "/*.png"),
         key=lambda x: int(x.split(sep)[-1].replace(".png", ""))
     ))
     status("swapping in progress...")