diff --git a/sandbox.go b/sandbox.go
index bf0cd72..cf1ea8c 100644
--- a/sandbox.go
+++ b/sandbox.go
@@ -65,7 +65,7 @@
 			return
 		}
 		if err := s.cache.Set(key, resp); err != nil {
-			s.log.Errorf("cache.Set(%q, %+v): %v", key, resp, err)
+			s.log.Errorf("cache.Set(%q, resp): %v", key, err)
 		}
 	}