diff --git a/README.md b/README.md
index c52a047..d0d50c4 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,25 @@
 # TMTC Commander EIVE
 
+# Run Linter
+
+Can be used to quickly check validity of script. Install `flake8` first
+
+```sh
+python3 -m pip install flake8
+```
+
+or on Windows
+
+```sh
+py -m pip install flake8
+```
+
+and then run the `lint.py` script
+
+```sh
+./lint.py
+```
+
 # Set up virtual environment
 
 ## Linux
diff --git a/lint.py b/lint.py
index f0f66f0..4a42485 100755
--- a/lint.py
+++ b/lint.py
@@ -4,11 +4,20 @@ import sys
 
 
 def main():
-    status = os.system("flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics")
+    # Ignore folder created by venv
+    exclude_dirs_flag = '--exclude bin,lib'
+    additional_flags_both_steps = '--count --statistics'
+    additional_flags_first_step = '--select=E9,F63,F7,F82 --show-source'
+    flake8_first_step_cmd = \
+        f'flake8 . {additional_flags_both_steps} {additional_flags_first_step} {exclude_dirs_flag}'
+    status = os.system(flake8_first_step_cmd)
     if os.WEXITSTATUS(status) != 0:
         print("Flake8 linter errors")
         sys.exit(0)
-    os.system("flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics")
+    flake8_second_step_cmd = \
+        f'flake8 . {additional_flags_both_steps} --exit-zero --max-complexity=10 ' \
+        f'--max-line-length=127 {exclude_dirs_flag}'
+    os.system(flake8_second_step_cmd)
 
 
 if __name__ == "__main__":
diff --git a/tmtc_client_cli.py b/tmtc_client_cli.py
old mode 100644
new mode 100755
diff --git a/tmtc_client_gui.py b/tmtc_client_gui.py
old mode 100644
new mode 100755
diff --git a/tmtccmd b/tmtccmd
index 2058b28..9497851 160000
--- a/tmtccmd
+++ b/tmtccmd
@@ -1 +1 @@
-Subproject commit 2058b28fa167fa1cc3eb7dd69b18b4968e86ddb1
+Subproject commit 94978512deb6c91a6a1456ae3a1182bf679f063a