diff --git a/mcp/bigmind/bigmind/web_render.py b/mcp/bigmind/bigmind/web_render.py
index a1273a0..d812e97 100644
--- a/mcp/bigmind/bigmind/web_render.py
+++ b/mcp/bigmind/bigmind/web_render.py
@@ -33,7 +33,8 @@ def _render_achievements(achievements: list) -> str:
 
         if a.get("image"):
             tier = a["id"].rsplit("_", 1)[-1]
-            visual_html = f'<div class="ach-image tier-{tier}">{lock_overlay}</div>'
+            img_url = _esc(a["image"])
+            visual_html = f'<div class="ach-image tier-{tier}" style="background-image: url({img_url});">{lock_overlay}</div>'
         else:
             visual_html = f'<div class="ach-icon">{a["icon"]}{lock_overlay}</div>'