diff --git a/oidc_provider/lib/utils/token.py b/oidc_provider/lib/utils/token.py
index 89dad4b..5d6e745 100644
--- a/oidc_provider/lib/utils/token.py
+++ b/oidc_provider/lib/utils/token.py
@@ -4,6 +4,7 @@ import uuid
 
 from Crypto.PublicKey.RSA import importKey
 from django.utils import timezone
+from hashlib import md5
 from jwkest.jwk import RSAKey
 from jwkest.jws import JWS
 
@@ -52,7 +53,8 @@ def encode_id_token(payload):
 
     Return a hash.
     """
-    keys = [ RSAKey(key=importKey(get_rsa_key())) ]
+    key_string = get_rsa_key().encode('utf-8')
+    keys = [ RSAKey(key=importKey(key_string), kid=md5(key_string).hexdigest()) ]
     _jws = JWS(payload, alg='RS256')
     _jwt = _jws.sign_compact(keys)