diff --git a/fdroidserver/update.py b/fdroidserver/update.py
index e8b76cf8..a25f0bcf 100644
--- a/fdroidserver/update.py
+++ b/fdroidserver/update.py
@@ -664,7 +664,7 @@ def make_index(apps, apks, repodir, archive, categories):
                              '-alias', config['repo_keyalias'],
                              '-keystore', config['keystore'],
                              '-storepass:file', config['keystorepassfile']]
-                            + config['smartcardoptions'])
+                            + config['smartcardoptions'], output=False)
             if p.returncode != 0:
                 msg = "Failed to get repo pubkey!"
                 if config['keystore'] == 'NONE':