diff --git a/auth.py b/auth.py
index 02b0a2a..f1fa522 100755
--- a/auth.py
+++ b/auth.py
@@ -103,7 +103,7 @@ def generateToken(**args):
             # print("DEBUG: generateToken: add claim {} -> {}".format(claim[0], claim[1]))
             payload[claim[0]] = claim[1]
 
-        return jwt.encode(payload, JWT_SECRET)
+        return jwt.encode(payload, JWT_SECRET, algorithm='RS256')
     except NoUserException:
         print("ERROR: generateToken: no user found, login or application wrong")
         raise werkzeug.exceptions.Unauthorized()