diff --git a/lib/omniauth/strategies/openid_connect.rb b/lib/omniauth/strategies/openid_connect.rb
index 9b414b74..e9d4b54d 100644
--- a/lib/omniauth/strategies/openid_connect.rb
+++ b/lib/omniauth/strategies/openid_connect.rb
@@ -422,7 +422,9 @@ def encoded_post_logout_redirect_uri
         return unless options.post_logout_redirect_uri
 
         URI.encode_www_form(
-          post_logout_redirect_uri: options.post_logout_redirect_uri
+          post_logout_redirect_uri: options.post_logout_redirect_uri,
+          id_token_hint: params['id_token_hint'],
+          state: params['state']
         )
       end