diff --git a/main/web_server.c b/main/web_server.c
index 514c5ad..2a38128 100644
--- a/main/web_server.c
+++ b/main/web_server.c
@@ -174,7 +174,7 @@ static const char SPA_PAGE[] =
     "    uids.forEach(function(u){"
     "      var nm=esc(data[u]);"
     "      html+='<div class=\"card-item\">';"
-    "      html+='<img class=\"card-thumb\" src=\"/api/art?uid='+u+'\" alt=\"art\" onerror=\"this.style.display=\\'none\\'\">';"
+    "      html+='<img class=\"card-thumb\" src=\"/api/art?uid='+encodeURIComponent(u)+'&card='+encodeURIComponent(data[u])+'\" alt=\"art\" onerror=\"var r=this.dataset.r||0;if(r<4){this.dataset.r=++r;var el=this;setTimeout(function(){el.src=el.src.split(\\'&_t=\\')[0]+\\'&_t=\\'+Date.now();},2500);}else{this.style.display=\\'none\\';}\">';"
     "      html+='<div class=\"card-info\"><div class=\"card-title\">'+nm+'</div><div class=\"card-uid\">'+u+'</div></div>';"
     "      html+='<button class=\"btn-del\" onclick=\"unbindCard(\\''+u+'\\')\">Unbind</button>';"
     "      html+='</div>';"
@@ -516,7 +516,7 @@ static esp_err_t handle_art(httpd_req_t *req)
     }
 
     httpd_resp_set_type(req, "image/jpeg");
-    httpd_resp_set_hdr(req, "Cache-Control", "public, max-age=86400");
+    httpd_resp_set_hdr(req, "Cache-Control", "no-cache, must-revalidate");
 
     char chunk[1024];
     size_t n = 0;