diff --git a/tailbone/views/upgrades.py b/tailbone/views/upgrades.py
index 602447e4..7475d0e1 100644
--- a/tailbone/views/upgrades.py
+++ b/tailbone/views/upgrades.py
@@ -231,7 +231,7 @@ class UpgradeView(MasterView):
                                class_='showing')
             return showing + diff.render_html()
         except:
-            log.exception("failed to render package diff for upgrade: {}".format(upgrade))
+            log.debug("failed to render package diff for upgrade: {}".format(upgrade), exc_info=True)
             return "(not available for this upgrade)"
 
     def changelog_link(self, project, url):