diff --git a/AC_PKCE/API_server/auth.py b/AC_PKCE/API_server/auth.py
index 9fd1f05..d44df7e 100644
--- a/AC_PKCE/API_server/auth.py
+++ b/AC_PKCE/API_server/auth.py
@@ -10,7 +10,7 @@ def verify_access_token(access_token):
   try:
     decoded_token = jwt.decode(access_token.encode(), public_key,
                                issuer = ISSUER,
-                               algorithm = 'RS256')
+                               algorithms = 'RS256')
   except (jwt.exceptions.InvalidTokenError,
           jwt.exceptions.InvalidSignatureError,
           jwt.exceptions.InvalidIssuerError,
diff --git a/AC_PKCE/auth_server/auth.py b/AC_PKCE/auth_server/auth.py
index d349a0c..afff07e 100644
--- a/AC_PKCE/auth_server/auth.py
+++ b/AC_PKCE/auth_server/auth.py
@@ -43,8 +43,8 @@ def generate_access_token():
     "exp": time.time() + JWT_LIFE_SPAN
   }
 
-  access_token = jwt.encode(payload, private_key, algorithm = 'RS256').decode()
-
+  access_token = jwt.encode(payload, private_key, algorithm = 'RS256')
+  
   return access_token
 
 def generate_authorization_code(client_id, redirect_url, code_challenge):