diff --git a/endpoints/web.py b/endpoints/web.py
index 036c5187a..8376cbeaf 100644
--- a/endpoints/web.py
+++ b/endpoints/web.py
@@ -699,7 +699,7 @@ def jwk_set_uri():
   return jsonify({
     'keys': [{
       'kty': 'RSA',
-      'alg': 'RSA256',
+      'alg': 'RS256',
       'use': 'sig',
       'n': urlsafe_b64encode(str(certificate.public_numbers().n)),
       'e': urlsafe_b64encode(str(certificate.public_numbers().e)),