diff --git a/MyQR/mylibs/data.py b/MyQR/mylibs/data.py
index e03faba..ea4af12 100644
--- a/MyQR/mylibs/data.py
+++ b/MyQR/mylibs/data.py
@@ -89,9 +89,10 @@ def alphanumeric_encoding(str):
     return code
     
 def byte_encoding(str):
+    str = bytes(str, encoding="utf8")
     code = ''
     for i in str:
-        c = bin(ord(i.encode('iso-8859-1')))[2:]
+        c = bin(i)[2:]
         c = '0'*(8-len(c)) + c
         code += c
     return code
@@ -108,11 +109,11 @@ def get_cci(ver, mode, str):
     else:
         cci_len = (14, 13, 16, 12)[mindex[mode]]
         
-    cci = bin(len(str))[2:]
+    cci = bin(len(bytes(str, encoding="utf8")))[2:]
     cci = '0' * (cci_len - len(cci)) + cci
     return cci
     
 if __name__ == '__main__':
     s = '123456789'
     v, datacode = encode(1, 'H', s)
-    print(v, datacode)
\ No newline at end of file
+    print(v, datacode)
diff --git a/MyQR/myqr.py b/MyQR/myqr.py
index 458bb4e..172a7e7 100644
--- a/MyQR/myqr.py
+++ b/MyQR/myqr.py
@@ -21,11 +21,8 @@
 # See [https://github.com/sylnsfar/qrcode] for more details!
 def run(words, version=1, level='H', picture=None, colorized=False, contrast=1.0, brightness=1.0, save_name=None, save_dir=os.getcwd()):
 
-    supported_chars = r"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ··,.:;+-*/\~!@#$%^&`'=<>[]()?_{}|"
-
-
     # check every parameter
-    if not isinstance(words, str) or any(i not in supported_chars for i in words):
+    if not isinstance(words, str):
         raise ValueError('Wrong words! Make sure the characters are supported!')
     if not isinstance(version, int) or version not in range(1, 41):
         raise ValueError('Wrong version! Please choose a int-type value from 1 to 40!')
@@ -129,4 +126,4 @@ def combine(ver, qr_name, bg_name, colorized, contrast, brightness, save_dir, sa
     finally:
         import shutil
         if os.path.exists(tempdir):
-            shutil.rmtree(tempdir) 
\ No newline at end of file
+            shutil.rmtree(tempdir)