diff --git a/lua/import-cost/job.lua b/lua/import-cost/job.lua
index c58cddc..a529167 100644
--- a/lua/import-cost/job.lua
+++ b/lua/import-cost/job.lua
@@ -27,6 +27,7 @@ function M.render_extmark(bufnr, data, extmark_id)
                 'ImportCostVirtualText',
             },
         },
+        hl_mode = 'combine',
     })
 end